Question

In the equilateral triangle ABC and isosceles triangle GHK with vertex angle G, m B + m G = 100 degrees. Which is m H − m B?

Answer 1

all the angles in the eqilateral are 60 degrees. two of the angles in the isosceles triangle are the same (the ones opposite the same sides). Use this info to solve your question, because you don't tell us which angles are which in the isosceles.