Sum of Interior Angles of a Triangle

Using a piece of paper cut into a triangle see how the sum of the interior angles of a triangle is 180 degrees.

[maxpercer]

Great demonstration, but not a proof :P
This can be used to motivate a conjecture - every euclidean triangle interior angle sum is 180 degrees or a straight angle.

[BraydenYang]

I rly needed this for my maths project, thx

[numannisamudeen]

This helped me with my project a lot thxxx

[Oxdrxg]

thnaks soo much i needed this for my star exam

[smakkacowtherealone]

Had to watch this for school, it was an amazing presentation!

[padmanavpatra]

Simply every tringle has three angles and in addition is. 180, degree.But this demo is very simple for students to understand, I like it.

[userfriendlyy]

thank you so muchhh, I needed it for my maths project:)

[mayahnunnaphatkitiakarapha]

Lesson: Every triangle has a sum of 180 degrees?

[fazmilaaslam]

How did you get this angle in the obtuse angle triangle

[TrickiestButOnYT]

thank you so much Simpson_math U be awesome

[sudarshangiram]

Very very simple.😂😂
But I was knowing this.

[Dark_Ninja]

how many are from Nirmala Convent School