< A is supplement of < B, < C is a complement of < B, difference between < A and < C ?

Question

angle A is a supplement of angle B, and angle C is a complement of angle B.  What is the difference between angle A and angle C ?   I know that A + B = 180,  and that B + C = 90 , but I have no idea of how to finish solving this. Any help out there?

Answer 1

Let's say <B=X, then <A=180 - X

If <B=X, then <C= 90 - X

difference between <A and<C= (180 -X) - (90-X)= 180-X-90+X=180-90=90