This document introduces perimeter, circumference, and area formulas for rectangles, squares, triangles, and circles. It provides examples of calculating the perimeter and area of each shape type. Formulas included are: perimeter of a rectangle as 2 length + 2 width, area of a rectangle as length x width; perimeter and area formulas for squares and triangles; circumference of a circle as 2πr and area of a circle as πr^2. The document emphasizes using the pi button on calculators even when directions specify 3.14 for pi.
