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Measuring angles using a protractor | Angles and intersecting lines | Geometry | Khan Academy Teacherflix 18 Tampilan • 2 bertahun-tahun yang lalu

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/cc-fourth-grade-m

Let's use our virtual protractor to measure some angles together, shall we?

Watch the next lesson: https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/Angle_basics/v/measuring-angles?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

Missed the previous lesson?
https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/Angle_basics/v/measuring-angles-in-degrees?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.

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 Geometry channel:
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Teacherflix 4 Tampilan • 7 bulan yang lalu

http://ABCmouse.com/LearnMore

"The Letter X Song" (See below for lyrics)

"The Letter X Song" explodes with the exciting rhythms of hip-hop music, which originated in the 1970s in New York City. Next time you and your child listen to "The Letter X Song", note how the background singers' X beatbox sound flows perfectly with the rap style of the lead singer. Since beatbox and rap are forms of making sounds and poetry, encourage your child to come up with their own beatbox sounds and raps!

About Us:
ABCmouse.com is an award-winning website that uses a variety of activities, including these songs, to help children build a strong foundation for future academic success. ABCmouse.com Early Learning Academy provides a full online curriculum in preschool, pre-k, and kindergarten, with more than 5,000 interactive learning activities that teach the subjects of reading, math, science, social studies, art, and music.

Parents, learn more about ABCmouse.com at http://ABCmouse.com/LearnMore.

Song Lyrics:
Mmm—wanna sing about the letter x?

Extra! Extra! Let's talk about it!
Letter x! Letter x! I want to shout about it!
An exceptional letter, extraordinary too—
letter x is the one that follows w!

X! X! "X"! "X"!
X! X! "X"! "X"!

Now, x sounds like "ks" inside of a word!
So every time you see an x, this is how it's heard—
excite, exceed, extreme, extent,
explore, explode—that's excellent!

"X"! "X"!
X! X! "X"! "X"!

Now, when you see an x at the end of a word,
the sound of "ks" will still be heard,
as in six, fix, ax, and mix,
flex, fox, wax, and ox.

Now, x is a crossing, and x marks the spot!
If you want to know some more, this is what I've got:
When x starts a word it's got the sound of a z.
Will I give you an example? Most definitely!
Xylophone, the instrument!
Well, that's one that you've probably heard.
Well, I think it's kind of funny that x can start a word!

X! Can I get an x? X! What a great letter.
X is my buddy. X is my friend.
X is the one I can see at the end.
X! That's letter x, y'all. That's letter x. X!
X! X! Let me tell you about x! "X"! "X"!
One more time, one more time, say x!

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The Bicycle: Great inventions that changed history | Educational Videos for Kids Teacherflix 34 Tampilan • 6 bulan yang lalu

Discover hundreds of never-before-seen resources! Create your free account at https://my.happylearning.tv/ and start learning in the most entertaining way.

What are you waiting for? Let's get on our bikes, on a trip back in time and let's learn how these great means of transport were made 🚴‍♀️

💭Which one of the first bicycles that existed would you rather ride??
👇Let me know in the comments bellow!
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With Happy Learning IT'S EASY PEASY 😉
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Recommended video: The Wheel
https://youtu.be/XzG1aPw7YBc
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The Bicycle: Great inventions that changed history.

Hello friends! Welcome to a new HAppy Learning Video! Today, in our section great inventions of history, we’re going to get to know… the bicycle.

The bicycle is one of the most fun means of transport there is! Also, it is very ecological, and very healthy! Since when we ride a bicycle, we do physical exercise!
But… do you know who, and when the bicycle was invented? No? Well, let’s find out!

The truth is, that alike many other inventions, the bicycle was invented in various phases and it was various people who intervened in its evolution until reaching the bicycle we know today!

Here you can see the first bicycle in history! It was invented by Karl Drais in 1817 but, it doesn’t look a lot like contemporary bikes, it didn’t have pedals and you had to push it with feet on the ground.

In 1861, the Frenchman Ernest Michaux thought of putting pedals on the front wheel, but because it didn’t balance correctly, people fell off and his idea didn’t succeed. But it was useful so in 1873, James Starley, an English inventor, would manufacture a bicycle with the front wheel a lot bigger than the back one. Although the falls from so high up were dangerous, he made it easier to drive them, so in 1873, Thomas Steven commenced the first trip around the world. He took three years to finish it.

In 1885, John Kemp Starley, James Starley’s nephew invented a safe bicycle. Because it had breaks, and was a lot lower, falls were less frequent and less dangerous. Exactly, it was more secure… he had created a contemporary bicycle. From this moment on, the bicycle became famous throughout the whole world. And it started to be used for Cirque shows, to travel or just to do sports. But… the bicycle’s history hasn’t ended, there are still new bikes being invented, like mountain bikes, race bikes, electric or some which won’t move no matter how fast you pedal, like at the gym… There are a lot of curious bicycles, like all of these… It’s clear that the bicycle is an invention which runs smoothly! So everyone let’s ride a bike!

Goodbye Friends, see you in the next Happy Learning video! Oh! And don’t forget to subscribe to Happy Learning Tv!