Answer:
C = 90
Step-by-step explanation:
ABC is similar to DEF
That means <A = <D
<B = <E
<C = <F
Since ABD is a triangle
A + B + C = 180
We know A = 75 and E = 15 and E = B = 15
Substituting what we know
75 + 15 + C =180
Combine like terms
90 + C = 180
Subtract 90 from each side
90-90 +C = 180-90
C = 90
