Yall need points for questions here you go

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?

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?