Posted by **Haley** on Tuesday, July 19, 2011 at 12:50pm.

Which equation can be used to find the unknow ange measures?

The diagram is a triganle. A= x+30, B= 3x, and C = x-15

A 5x+15=90

B 5x+45-180

C 3x^3+15=180

D 5x+15=180

E 3x+30=180

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