PLEASE HELP!! Will fan and medal!! Prove that the sum of the measures of the interior angles of a triangle is 180°. Be sure to create and name the appropriate geometric figures.

Question

bela · Answer

https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/triang_prop_tut/v/proof-sum-of-measures-of-angles-in-a-triangle-are-180

johnweldon1993 · Answer

Alright so lets see, I still didnt watch that ^ lol so let me know if its the same process

Say we have a triangle

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johnweldon1993 · Answer

We want to prove that those angles add up to 180 degrees

So what if I were to draw a line parallel to the base

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johnweldon1993 · Answer

What could we say about these 2 angles I have circled:

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