Answer:
B
Explanation:
the sum of the angles in a triangle = 180°
in the lower triangle
subtract the sum of the 2 given angles from 180° for third angle
third angle = 180° - (41 + 78)° = 180° - 119 = 61°
the lower right angle in the upper triangle is vertically opposite the third angle in the lower triangle and are congruent , that is both 61°
using the sum of the angles in a triangle = 180° , then
w = 180° - (61 + 52)° = 180° - 113° = 67°