Can someone help please

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Graph the linear function using the slooe and y intercept

If you were constructing a triangular frame, and you had wood in the length of 4inches, 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