The most ICONIC proof in geometry!

This proves that the angle sum of a triangle is 180 degrees.
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bprp #fast

[bprpfast]

Which one is more iconic: this one or the Pythagorean theorem?

[Ninja]

No one ever showed me the angle sum of a triangle. My teachers just straight away told us its 180 degrees without showing us why. I’m thankful to see teachers like you to help me see this.

[mathmancalc]

I had my students make their own triangles of varied sizes. Then they folded in all the corners to find that it always makes a straight line (180°). That's how I taught sum of angles of a triangle.

[marouaniAymen]

But it's based on the assumption that there 's a unique parallel line that passes from a point outside a given line. This is not an axiom for geometry, the title of the video can add the precision "in Planar Geometry"

[user]

Not gonna lie, I misread it as "the most ironic proof in geometry"😂

[prakhar_zz]

Always Used This Property...!
Nice To See Other Side Of It..!!
✅👍

[nowonmetube]

Me: *feeling sleepy*
The video: *CLONK* 😭😭

[shrick]

so this why we can't draw a triangle if one side longer than sum of other two.

[mr_angry_kiddo]

This proves that sum of angles in triangle 📐 is 180°

[danlake]

Can someone please explain what is being proved here?

[abhikdixit]

I studied the proof in 9th standard; the very previous year.

India, CBSE.

[fatmatufail]

Hey I just proved it in my exam in class 9th... I'm feeling quite heroic!

[ethio-juvenilechannel]

We learn this in lowerr classes in Ethiopia!

[chronicsnail]

I have to disagree, IMO the most iconic proof is:
To construct an equilateral triangle on a given finite straight line. Let AB be the given finite straight line. It is required to construct an equilateral triangle on the straight line AB.

[ilickcatnip]

"The sum of the squre roots of any two sides of an isosceles triangle is equal to the square root of the third side."

[saiyamjain]

I may sound harsh but this proof is thought in India in class 8

[BlokenArrow]

This assumes the fifth postulate is true, even though it isn’t proven true.

[MelomaniacEarth]

Literally no one....no pythagoras nt a Euclid
But BPRP: showing us the iconic proof😂

[mathevengers]

That's learnt in 5 grade by Indians.