Answer:
z = 80
Step-by-step explanation:
A quadrilateral has angles that sum to 360 degrees
E + C+ G+F = 360
100+60+120+F = 360
Combine like terms
280+F = 360
F = 360-280
F = 80
We know that ABCD is similar to FECG
That means the measure of A = measure of F
z = 80
