Angle B2 measures 55 degrees.
To determine the missing values, let's assume these angles are part of a triangle:
Angles in a triangle sum up to 180 degrees. So, for angles A1 and A2:
A1 + A2 + B2 = 180 degrees
Given:
A1 = 65 degrees
A2 = 60 degrees
Let's find B2:
A1 + A2 + B2 = 180
65 + 60 + B2 = 180
125 + B2 = 180
B2 = 180 - 125
B2 = 55 degrees
So, angle B2 measures 55 degrees.