Question

In triangle ABC, m∠A=24° and m∠B= m∠C. Find m∠B.

Answer 1

m<B = 78°

Explanation:

m∠A + m∠B + m∠C = 180°

m<B = m<C

Since m<B = m<C, we can substitute m<B for m<C.

24° + m<B + m<B = 180°

2m<B = 156°

m<B = 78°