Question

ΔABC has the following angle measures: A = 40 degrees, B = 60 degrees, and C = 80 degrees. The triangle is reflected across the x-axis to obtain ΔA’B’C’. What is the measure, in degrees, of angle B' ?

Answer 1

60 degrees.

Explanation:

A reflection does not alter the size of the angles of the triangle so B = 60 degrees.