Question

8)
155°
60°
?

Explanation:

Step1: Find adjacent angle

The 155° angle and the adjacent angle in the triangle are supplementary.
Adjacent angle = $180^\circ - 155^\circ = 25^\circ$

Step2: Calculate unknown angle

Sum of triangle angles is $180^\circ$.
Unknown angle = $180^\circ - 25^\circ - 60^\circ = 95^\circ$

Answer:

95°