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Proof: Vertical angles are equal | Angles and intersecting lines | Geometry | Khan Academy Teacherflix 9 Views • 2 years ago

Proving that vertical angles are equal

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/ang_intro/e/congruent_angles?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

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

Missed the previous lesson?
https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/ang_intro/v/using-algebra-to-find-the-measures-of-vertical-angles?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:
https://www.youtube.com/channe....l/UCD3OtKxPRUFw8kzYl
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Mega millions jackpot probability | Probability and combinatorics | Precalculus | Khan Academy Teacherflix 8 Views • 2 years ago

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

Probability of winning the Mega Millions jackpot

Practice this lesson yourself on KhanAcademy.org right now:
https://www.khanacademy.org/math/precalculus/prob_comb/prob_combinatorics_precalc/e/probability_with_perm_comb?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Watch the next lesson: https://www.khanacademy.org/math/precalculus/prob_comb/prob_combinatorics_precalc/v/generalizing-with-binomial-coefficients-bit-advanced?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Missed the previous lesson?
https://www.khanacademy.org/math/precalculus/prob_comb/prob_combinatorics_precalc/v/permutations-and-combinations-4?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus

Precalculus on Khan Academy: You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn't mean anything unless you have some knowledge of what calculus is. Let's keep it simple, shall we? Calculus is a conceptual framework which provides systematic techniques for solving problems. These problems are appropriately applicable to analytic geometry and algebra. Therefore....precalculus gives you the background for the mathematical concepts, problems, issues and techniques that appear in calculus, including trigonometry, functions, complex numbers, vectors, matrices, and others. There you have it ladies and gentlemen....an introduction to precalculus!

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 Precalculus channel:
https://www.youtube.com/channe....l/UCBeHztHRWuVvnlwm2
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Relations & Functions in 10 mins 😱🔥 Chapter 1 Maths Class 12 Boards 2022-23 Score 95+ Vishal Kha Teacherflix 8 Views • 2 years ago

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Fractions as Division - Fast and Easy Math Learning Videos Teacherflix 2 Views • 2 years ago

For Free Practice Go To: http://[a]www.ilearn.com%2Ffractions[/a]

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If you prefer to read, rather than watch this video, here’s the transcript:

Title: Fractions as Division - Fast And Easy Math Learning Videos

You already know that you can write the remainder in a division problem as a fraction. In this lesson you’ll learn that all division problems can be written as fractions. First let’s review writing remainders as fractions:
Thirteen divided by 3.
Remember: to solve this problem we make an array.
The array we made is 3 by 4, and there’s 1 left over.
Now we break each of our remaining blocks into 3 parts.
And we continue making the array with the parts.
So, now the array we’ve made is 3, by 4 and one-third.
So, 13 divided by 3 is equal to 4 and one-third.
Instead of just splitting the remainder blocks into thirds, we could have split all of the blocks into thirds before forming the array, like this.
Now we’ll make an array. Remember, since we split the blocks into thirds, each whole block will end up being 1 column in the array.
So the array we formed is 3 by thirteen-thirds.
So 13 divided by 3 is equal to thirteen-thirds.
We can do the same thing for all division problems. Any division problem can be rewritten as a fraction with the numerator as the dividend and the denominator as the divisor.
Let’s look at another example.
Three divided by 4.
Since 3 is less than 4 we cannot make an array without splitting each of the blocks into fourths, like this.
Now we can make an array.
So the array we formed is 4 by three-fourths
So 3 divided by 4 is equal to three-fourths.
Let’s look at another example: 56 divided by 9. We can rewrite this as a fraction with 56 as the numerator, and 9 as the denominator.
Let’s look at one last example
Four-sixths. Just as we can rewrite division problems as fractions, we can also rewrite fractions as division problems. So four-sixths is equal to 4 divided by 6.
In the remainder of this lesson you’ll rewrite division problems as fractions and fractions as division problems.

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https://youtu.be/l4I7Hj-Taxc