Help pleas a) a term
b) a formula
c) an expression
states a rule using variables

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

The measure of an angle is 117°. what is the measure of a supplementary angle?

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?