Furthermore, octagons, pentagons and hexagons are polygons named according to the number of sides and angles. The perimeter is the distance around an object. To find the perimeter, add the lengths of all sides together. Area Area is the number of square units covering a surface. Then add them together.
Volume is the amount of space an object contains.
To find the volume of a rectangular prism, multiply the length times the width times the height. This chapter deals with circles and the terms related to them such as center, radius, diameter and chord. It also deals with finding the circumference and area of a circle. The distance around a circle is called the circumference. Probability Probability is the ratio that tells you how likely it is that a certain event will happen.