Acircular garden is enclosed by a fence that is about 78.5 feet long. to the nearest foot, what is the diameter of the circular garden? use 3.14 for π.

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Combine like terms to make a simpler expression 3z+z