Geometry - Khan Academy

17/24 Videos

1

Introduction to angles (old) | Angles and intersecting lines | Geometry | Khan Academy

Khan Academy

00:09:56

2

Angles (part 2) | Angles and intersecting lines | Geometry | Khan Academy

Khan Academy

00:09:05

3

Angles (part 3) | Angles and intersecting lines | Geometry | Khan Academy

Khan Academy

00:09:48

4

Angles formed between transversals and parallel lines | Geometry | Khan Academy

Khan Academy

00:07:53

5

Angles of parallel lines 2 | Angles and intersecting lines | Geometry | Khan Academy

Khan Academy

00:05:15

6

The angle game | Angles and intersecting lines | Geometry | Khan Academy

Khan Academy

00:09:02

7

Similar triangles | Similarity | Geometry | Khan Academy

Khan Academy

00:09:34

8

Similar triangles (part 2) | Similarity | Geometry | Khan Academy

Khan Academy

00:09:55

9

Angle game (part 2) | Angles and intersecting lines | Geometry | Khan Academy

Khan Academy

00:09:50

10

Area and Perimeter

Khan Academy

00:12:20

11

us, diamete_radir, circumfencere and Pi | Geometry | Khan Academy

Khan Academy

00:11:05

12

Area of a circle

Khan Academy

00:06:45

13

The Pythagorean theorem intro | Right triangles and trigonometry | Geometry | Khan Academy

Khan Academy

00:10:46

14

Pythagorean theorem II | Right triangles and trigonometry | Geometry | Khan Academy

Khan Academy

00:09:37

15

45-45-90 triangles | Right triangles and trigonometry | Geometry | Khan Academy

Khan Academy

00:09:31

16

Intro to 30-60-90 triangles | Right triangles and trigonometry | Geometry | Khan Academy

Khan Academy

00:09:40

30-60-90 Triangles II

Khan Academy

00:04:49

18

Heron's formula | Perimeter, area, and volume | Geometry | Khan Academy

Khan Academy

00:04:43

19

Part 1 of proof of Heron's formula | Perimeter, area, and volume | Geometry | Khan Academy

Khan Academy

00:11:00

20

Part 2 of proof of Heron's formula | Perimeter, area, and volume | Geometry | Khan Academy

Khan Academy

00:12:08

21

Inscribed angle theorem proof | High School Geometry | High School Math | Khan Academy

Khan Academy

00:14:17

22

Area of inscribed equilateral triangle (some basic trig used) | Circles | Geometry | Khan Academy

Khan Academy

00:11:39

23

Proof: Right triangles inscribed in circles | High School Math | Khan Academy

Khan Academy

00:05:35

24

Area of diagonal generated triangles of rectangle are equal | Geometry | Khan Academy

Khan Academy

00:04:36

30-60-90 Triangles II

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Khan Academy
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Im Mathematik & Naturwissenschaften / Mathematik

More examples using 30-60-90 triangles.
More free lessons at: http://www.khanacademy.org/video?v=3mLUJSoh6i0

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