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Elena wants to prove that the measures of the 3 angles in a triangle always
sum to 180 degrees. She starts by using rigid motions to rotate triangle ABC
180° around 2 midpoints. Explain how Elena labeled her diagram and finish
her proof.
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Elena wants to prove that the measures of the 3 angles in a triangle always sum to 180 degrees She starts by using rigid motions to rotate triangle ABC 180 arou class=

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gamerplayz845

My best explanation to this question is:

Elena has summed the total of all three angles in the straight angle to get 180°; <DAB, <BAC , and <CAE. But this does not mean a total of three angles will ALWAYS equal 180°. If one angle is greater than the other two, then there is a possible chance the angle will not be 180°. If the angles are scalene, then there is a greater chance the angle may not be 180°.

This may be wrong, so you don’t have to come up with my response exactly, just modify it to what you need. Wish you luck.

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