HELP LOL, i dont understand

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: