Question

Three lines form a triangle as shown.

What is the measure, in degrees, of ∠YXZ? Enter your answer in the box.

Answer 1

Angle at Y = 180-135 = 45, because it divides the straight line XY in two pieces that together should always be 180
Angle at Z = 49, because the angle on the other side of Z is mirrored.
Angle YXZ = 180 - 49 - 45 = 86 because all three angles of a triangle should add up to 180