Question

Question
In a geometric figure two intersecting lines create four angles, where ∠1
and ∠3
are a vertical pair. If m∠1=(3x−25)°
and m∠3=104°
, what is the value of x
?(1 point)

Answer 1

Vertical angles are congruent, so set their measures equal:

3x − 25 = 104
3x = 129
x = 43

Answer: x = 43.