Answer:
a) 42
b) 23
F) 115
Step-by-step explanation:
First, find the angles that are missing in triangle CD1F. (D1 being the inside angle of the triangle)
D1 make a line with 157 and results in 180.
Therefore, 180 - 157 = 23
Now you can find F, 180 - 42 - 23 = 115
A and C are vertical opposites and have the same angle, so 42.
B = 180 - 115 - 42 = 23
