Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/precalculus/x9e81

Practice this lesson yourself on KhanAcademy.org right now:
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Watch the next lesson: https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry/law-sines-cosines/v/law-of-cosines-missing-angle?utm_source=YT&utm_medium=Desc&utm_campaign=Trigonometry

Missed the previous lesson?
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Trigonometry on Khan Academy: Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry ("trig" as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder...how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials!

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Trigonometry channel:
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/co....mputing/computer-sci

Can you tell the difference between actions based upon flipping a coin and those based upon blind guessing or simulating randomness? This short video examines the frequency stability property.

Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/case-study-ww2-encryption-machines?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience

Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/one-time-pad?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience

Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information).

About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channe....l/UC8uHgAVBOy5h1fDsj
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How many balloons does Peck have for his party? The last number you say is the number of balloons! Learn how to count to seven with Peck the Bird from Khan Academy Kids.

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

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➡️ http://khan.co/KhanKids-YT-Google
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You can also access other Counting 1-10 videos on our Counting playlist, here: http://khan.co/KhanKids-Counting.

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How many soccer balls does Peck have? The last number you say is the number of soccerballs! Learn how to count to eight with Peck the Bird from Khan Academy Kids.

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
➡️ http://khan.co/KhanKids-YT-Apple
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You can also access other Counting 1-10 videos on our Counting playlist, here:
http://khan.co/KhanKids-Counting.

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The word "now" is spelled n-o-w. "Now" means at the present time. Sandy will jump into the pool now!

Learn the sight word "now" with the Khan Academy Kids characters. The fun example, easy-to-remember definition, and cute illustrations will help kids remember the word any time they come across it.

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
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You can also access other sight words videos on our Sight Words playlist here: http://khan.co/KhanKids-SightWords.

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Learn the letter C with Ollo the Elephant from Khan Academy Kids!

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
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You can also access other letters of the alphabet on our Letters and Letter Sounds playlist here: http://khan.co/KhanKids-Letters

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Learn the letter B with Ollo the Elephant from Khan Academy Kids!

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade.

Available on Google Play, Apple, and Amazon app stores:
➡️ http://khan.co/KhanKids-YT-Google
➡️ http://khan.co/KhanKids-YT-Apple
➡️ http://khan.co/KhanKids-YT-Amazon

You can also access other letters of the alphabet on our Letters and Letter Sounds playlist here: http://khan.co/KhanKids-Letters

Subscribe to our channel for more videos like this.

Khan Academy Kids is excited to present Circle Time! Join us for stories and activities for young children on weekday mornings with Caroline, Sophie, and friends. Today, we’re learning about 3 super powers for dealing with times of change, including thankfulness, deep breathing, and how to be a helper. By exercising mindfulness and social-emotional skills, we can help ourselves and each other thrive in times of change.

Ready to lead the way? Check out our free printable worksheet to put your 3 super powers into action! http://khan.co/KhanKids-Print-Mar26

Learn more about Khan Academy Kids, our free educational app for kids ages 2-7 at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:
http://khan.co/KhanKids-YT-Apple
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http://khan.co/KhanKids-YT-Amazon

Learn more counting, addition, and subtraction lessons in the FREE Khan Academy Kids app! https://go.learn.khanacademy.o....rg/khanacademy/YouTu

Use ten frames to add the numbers eight plus six. Work with Peck to move the dots into the ten frame to solve the equation.

Visit us at http://www.khankids.org to learn more about Khan Academy Kids, a free educational app for preschool through 2nd grade available on Apple, Google Play, and Amazon app stores.

You can also access other videos on our Addition and Subtraction playlist here: http://khan.co/KhanKids-AdditionSubtraction

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Questions? Reach our team at khankids@khanacademy.org.

Start today’s Circle Time with Caitie from Super Simple Songs as she sings “Walking in the Jungle”. Then, talk with Caroline and Sophie about more jungle animals, how they look, and how they sound. Learn more about animals while reading the book “Baby Monkeys” by Bellwether Media. Trace the letter M, and count the syllables in the word “mon-key”. Try activity time with a scavenger hunt, and share ideas for what you might find either outside or inside.

Share your favorite animal with us on Show & Tell! http://khan.co/KhanKids-ShowAndTell.

Looking for more kid-friendly activities? Don’t miss our Printables page, here:
http://khan.co/KhanKids-Printables.

Learn more about Khan Academy Kids, our free educational app for children ages 2-7, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Subscribe to our channel so you don’t miss a single resource from Khan Academy Kids, and access all of our Circle Time videos on our Circle Time Playlist! http://khan.co/KhanKids-CircleTimePlaylist.

Questions or ideas for Circle Time? Reach our team at khankids@khanacademy.org.

Join our Circle Time hosts as they read the book Baby Pigs by Bellwether Media. See real-life photos of little piglets, and learn about how they grow, play, and dig for food. Then see more baby animals from the county fair. Don’t miss the ducklings in the fountain! Wrap up with a wonderful segment of Show & Tell, where friends share their artwork with us.

Learn more about Khan Academy Kids, our free educational app for children ages 2-8, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Remember to subscribe to Circle Time to be reminded of our new shows!

You can also access all of our Circle Time videos on our Circle Time Playlist, here: http://khan.co/KhanKids-CircleTimePlaylist.

Questions? Reach our team at khankids@khanacademy.org.

Read the book “Seven Days A Week” by Cynthia Platt with Caroline & Sophie from Khan Academy Kids. Think about activities during the week and if they are daily or weekly. See how Teacher Aimee plans a flexible workspace for learning just in time for back to school. Count to 7 with lessons from the Khan Academy Kids app. Enjoy artwork from friends who share character drawings on Show & Tell.

Would your kids like to be on Show & Tell? Submit your artwork, photos, or videos here: http://khan.co/KhanKids-SubmitYourArt.

Looking for more kid-friendly activities? See our latest printable worksheets: http://khan.co/KhanKids-Printables.

Learn more about Khan Academy Kids, our free educational app for children ages 2-7, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Subscribe to our channel so you don’t miss a single resource from Khan Academy Kids, and access all of our Circle Time videos on our Circle Time Playlist! http://khan.co/KhanKids-CircleTimePlaylist.

Questions or ideas for Circle Time? Reach our team at khankids@khanacademy.org.

Welcome to Circle Time with Khan Academy Kids. Today, Caroline and Sophie are reading the book, “What’s a Duck to Do?” by Cynthia Platt. It’s the story about a duck who gets stuck, and then finds a solution to make herself feel better. Read along with us and discover how patience, perseverance, and mindfulness can help find moments of peace.



Check out our printable activities for hands-on fun!
http://khan.co/KhanKids-Printables


Learn more about Khan Academy Kids, our free educational app for children ages 2-7 at http://www.khankids.org.


Available on Apple, Google Play, and Amazon app stores:
http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon


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Welcome to Circle Time! Sophie from Khan Academy Kids has a very special guest today. In this episode kids will meet Kristi Yamaguchi, an Olympic figure skating gold medalist, as she reads the book Cara’s Kindness. It’s a sweet story about an adorable group of animal characters who help each other through acts of kindness. Learn more about Kristi's program to support early literacy at Always Dream: https://www.alwaysdream.org/program/.

We’d love to know what ideas your kids have for helping others. Keep in touch and share their ideas through artwork, photos, or videos here: http://khan.co/KhanKids-SubmitYourArt.

Learn more about Khan Academy Kids, our free educational app for children ages 2-8, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Remember to subscribe to Circle Time to be reminded of our new shows! You can also access all of our Circle Time videos on our Circle Time Playlist, here: http://khan.co/KhanKids-CircleTimePlaylist.

Dear Friends,

We’re celebrating! Circle Time with Khan Academy Kids has reached 100K subscribers on YouTube and we couldn’t have done this without you! Our Circle Time hosts want to thank you for being part of the Khan Kids community. Join Caroline and Sophie as they reflect on their favorite moments, like singing songs with Teacher Caitie from @SuperSimpleSongs , reading books with Bellwether Media, and sharing colorful artwork during Show & Tell. We appreciate each and every one of our viewers who helped make this moment possible. Three cheers for you from the Khan Kids crew!

Learn more about Khan Academy Kids, our free educational app for children ages 2-8, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Subscribe to our channel so you don’t miss a single resource from Khan Academy Kids, and access all of our Circle Time videos on our Circle Time Playlist! http://khan.co/KhanKids-CircleTimePlaylist.

Learn how to draw Reya the Red Panda from Khan Academy Kids with Kim Ferrari, our lead animator. An animator is someone who draws, and makes those drawings move. Draw alongside Kim as she explains Reya’s structure, and all of the shapes that make up her face. Practice drawing shapes like teardrops and triangles to make your own Reya. Then, color Reya in with two shades of pink!

Can your kids draw Reya too? Send us your drawings of Reya, here! http://khan.co/KhanKids-SubmitYourArt.

Learn more about Khan Academy Kids, our free educational app for children ages 2-7, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Subscribe to our channel so you don’t miss a single episode of Circle Time!

Questions or ideas for Circle Time? Reach our team at khankids@khanacademy.org.

Learn how to draw Peck the bird from Khan Academy Kids with Kim Ferrari, our lead animator. This behind-the-scenes look at how our characters are created may inspire young artists to get out their pencils and give it a try!

Printable activity: Draw a shirt for Peck the bird
http://khan.co/KhanKids-Print-April3

Would your kids like to draw Peck? Show us what they create! Artwork submissions welcome at http://khan.co/KhanKids-SubmitYourArt.

Learn more about Khan Academy Kids, our free educational app for children ages 2-7 at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:
http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Subscribe to our channel so you don’t miss a single episode of Circle Time!

Start today’s Circle Time with a special Show & Tell! Caroline and Sophie from Khan Academy Kids share artwork submitted by children. Then, learn how to draw Ollo the Elephant with Kim Ferrari, our lead animator. An animator is someone who draws, and makes those drawings move. Watch carefully as Kim explains Ollo’s structure, and drawing techniques for creating his face, ears, and trunk. Practice drawing to make your own version of Ollo the elephant.

Are your kids ready to draw Ollo? Submit your drawing here: http://khan.co/KhanKids-SubmitYourArt. For more Show and Tell submission ideas, check out our list here: http://khan.co/KhanKids-ShowAndTell.

Looking for more kid-friendly activities? Don’t miss our Printables page, here:
http://khan.co/KhanKids-Printables.

Learn more about Khan Academy Kids, our free educational app for children ages 2-7, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Subscribe to our channel so you don’t miss a single resource from Khan Academy Kids, and access all of our Circle Time videos on our Circle Time Playlist! http://khan.co/KhanKids-CircleTimePlaylist.

Questions or ideas for Circle Time? Reach our team at khankids@khanacademy.org

Join Caroline and friends for a special episode of Circle Time with Khan Academy Kids. Read two books about dinosaurs. Start with Dinosaur Day by Cynthia Platt which features a dinosaur dress-up day with the Khan Kids crew. Learn words with the soft c sound, like celebrate, excited, and fancy. Then, read all about the Tyrannosaurus Rex! Don’t miss Show & Tell with amazing dinosaur artwork from friends.

If you or your child would like to be a guest on Circle Time, please send your submissions to our team. We love sharing artwork, photos, and videos during Show & Tell! http://khan.co/KhanKids-SubmitYourArt.

Learn more about Khan Academy Kids, our free educational app for children ages 2-8, at http://www.khankids.org.

Available on Apple, Google Play, and Amazon app stores:

http://khan.co/KhanKids-YT-Apple
http://khan.co/KhanKids-YT-Google
http://khan.co/KhanKids-YT-Amazon

Subscribe to our channel so you don’t miss a single resource from Khan Academy Kids, and access all of our Circle Time videos on our Circle Time Playlist! http://khan.co/KhanKids-CircleTimePlaylist.

Questions or ideas for Circle Time? Reach our team at khankids@khanacademy.org.