Question

Triangle ABC is isosceles with m(∠A) = 110°. How many degrees is m(∠B)?

Answer 1

35° 21

Explanation:

In an isosceles triangle, the angles opposite to the equal sides of an isosceles triangle are equal in measurement1. Therefore, if ∠A = 110° and ABC is an isosceles triangle, then ∠B = ∠C = (180° - ∠A)/2 = (180° - 110°)/2 = 35° 21.

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