# Thread: Need urgent help in Geometry!

1. ## Need urgent help in Geometry!

My teacher said we have to use this equation, but I'm not sure why or how to apply:
90-m=2(180-m)

Problem:
Angle A is 1/2 it's complement, angle B

Any ideas???
Thanks for any help!

2. Angle A is 1/2 it's complement, angle B

the above statement says A + B = 90 and A = B/2

so ...

(B/2) + B = 90

solve for B, then determine A.

this equation ...

90 - m = 2(180 - m)

would not be applicable to the above problem.