What is the 3rd side of the triangle equal if two sides are 2,8

Need ! easy 6th grade work! i will put as much points as i can! you so much! i’m learning this in math and it’s soo

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?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?