Respuesta :

This is usually used as a proof that triangles have 180°.  Look at the attached figures.  If you cut off angle A, angle B and angle C and rotate them so that their vertices touch, you form a half-circle out of them (or a straight line).  We know that half a circle is 1/2 of 360° or 180; therefore all 3 angles in a triangle must add up to 180°.
Ver imagen MsEHolt
Ver imagen MsEHolt

It should be noted that a triangle is a polygon with three edges and three vertices.

What is a triangle?

A triangle is a simple closed curve or a polygon that is formed by three line segments.

It should be noted that triangles have 180°.  In this case, looking at the attached figure, it can be deduced that the addition of the angles equals 180.

Learn more about triangles on:

https://brainly.com/question/17335144

Ver imagen topeadeniran2