LT 9.2 apply formulas for circles and regular polygons

Math Humor Q: What do you get when you divide a jack –o-lantern’s circumference by it’s diameter A: pumpkin pi

circle The set of points in a plane that are fixed distance from a given point called the center of the circle. center of the circle The point inside a circle that is the same distance from every point on the circle.

Find the circumference of circle C.  

A pizza parlor offers pizzas with diameters of 8 in. , 10 in A pizza parlor offers pizzas with diameters of 8 in., 10 in., and 12 in. Find the area of each size pizza. Round to the nearest tenth.  

center of a regular polygon The point that is equidistant from all vertices of the regular polygon. apothem The perpendicular distance from the center of a regular polygon to a side of the polygon. central angle of a regular polygon An angle whose vertex is the center of the regular polygon and whose sides pass through consecutive vertices.

Find the area of the regular polygon. Round to the nearest tenth.

Find the area of an equilateral triangle with an apothem of 2 ft Find the area of an equilateral triangle with an apothem of 2 ft. Round to the nearest tenth.