Drag the missing statements and reasons to the correct spot to complete the proof

You are assembling pieces of an iron gate to complete a fence. the finished gate will look like the one below. in order to assemble the gate it is important to under how the pieces are related. part 1: how are pies 1 and 2 in the archway related? part 2: how are the rectangular sections 5 and 6 in the center of the gate related to each other?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

Evaluate the expression. (9 + 5)(3 + 2)0