Question

ZA and ZB are vertical angles. If m_A = (4x – 13)° and m

ZB = (3x + 19)', then find the measure of ZA.

Answer 1

115 degrees

Explanation:

Vertical angles are congruent by the vertical angles theorem.

Hence,

<A=<B

4x-13=3x+19

x=32

Substituting 32 in for x in <A

4(32)-13= 115