Question

Refer to the diagram below. If m∠FGJ=21º, find m∠GCD.

Answer 1

69

Step-by-step explanation:

so angles FGJ and BGC are the same. The inside of a triangle is 180 degrees.

`GCD=x\\180=90+21+x\\180=111+x\\180-111=111+x-111\\69=x`