01:22

The expansion of a cylinder and a cone.| Geometry Basic.

03:55

Find angle X.| A Nice and Classic geometry problem.

02:41

How many laps which small circle rotated? | Nice geometry problem.

01:36

Find Shaded Area, 2ND unexpected Solution!

01:34

Find Area of Shaded region with An unexpected Solution!

03:00

Find area of shaded region.| learning geometry skills.

04:21

Learning solve 5 basic geometry problem. | You will not hate geometry. Geometry is beautiful!

02:20

Prove Red = Blue. | Geometry skills for tangent lines

02:02

Find value of "X"| The 2nd Way, a very nice solution!

04:19

Find value of "X"

08:47

Find Centroid,Orthocenter,Circumcenter,Incenter of triangle only with Straightedge! HARD PROBLEM

01:16

How to find the area of blue triangle fast?

03:15

Can you calculate angle "X"?

02:59

Secret of median in triangle

03:48

Can you find the value of segment BLUE? | a nice geometry problem.

01:55

One way to prove Pythagorean theorem

06:14

How to solve this hard algebraic function by a golden triangle? | geometry skills in algebra.

02:38

Find Area of Quadrilateral ABCD. | a nice geometry problem.

05:01

Find Radius and golden ratio point in this diagram.

04:15

If without auxiliary, trigonometric function and coordinate. Can you solve this problem?

06:28

Hard than it looks.| a nice geometry problem with unexpected solution.

06:26

Find area of shaded region. | 2 pure geometry ways!

07:49

Find Area of Shaded Region in the Heart. | 2 solutions.

05:23

Find Radius. | An unexpected solution.

05:44

How to find the minimum value area of shaded region? | a nice geometry problem.

03:35

How to find the area of shaded region? | 90% missed this trick.

03:57

How to find the area of shaded region? | Nice problem with important geometry skills.

05:14

How to find the radius of circle? | a nice geometry problem.

05:05

Find Angle X. | An unexpected solution.

06:36

How to find Area of Square in this diagram? | Funny geometry problem.

07:10

Can You Prove α=β？| It's hard than it looks.

23:55

How to solve this problem with 5 solutions? | It's a big Challenge!

06:02

Can You Find Area of Shaded Region Blue?

06:01

Find Area of Rectangle. | a nice geometry problem.

15:23

Can You Prove Red Triangle is Similar to Blue? | Geometry Challenge.

04:53

Can You Find the Blue Area?

06:41

Find Rectangle Area.

04:24

How to Solve the Shaded Area Fast? | Funny geometry skills.

07:53

Can you prove Red is a right angle?

11:28

Can You Solve This Puzzle?

06:56

How to Calculate Perimeter and Area in this Diagram?

05:20

Find Angle X.

07:21

Can you Find the value of Blue?| Thinking out of box by PURE geometry.

02:58

Which Shaded Area is larger? | Important geometry tricks you should know.

06:59

How to find radius in this diagram?

05:50

99% miss this trick, what is the area of blue?

09:39

How to solve the area of an irregular shape?

05:34

Important geometry corollary you should know.|Fun of geometry.| geometry animation.

04:20

Find angle X. | EP5.

03:48

Find angle X. | EP4.

05:02

Find angle X. | EP3.

04:32

Find angle X. | EP2.

05:38

Find angle X. | EP1.

15:27

Find angle X by 5 ways.

05:04

99% miss this trick, what is the length of Blue?

04:22

Find angle X.

02:56

Find angle X. | a nice geometry problem.

01:59

How to prove Pythagorean theorem with windmill? | Geometry Magic. | Geometry animation.

05:22

0.01% know this trick, what is the area?

02:25

What is the value of tangent β? | smart way vs genius way.