Question

What is the measure of a base angle of an isosceles triangle if its vertex angle measure 80

Answer 1

Knowing base angles theorem, we know that if the triangle is isosceles, then the bottom base angles and congruent. That means that, we must subtract 80 from 180 and then divide the number by 2, since we must find 1 base angle. This brings us to the answer, 50 degrees.

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