The perimeter is the distance around a two-dimensional shape. The perimeter of a square is 4xside, for a rectangle it is 2(a+b) where a and b are the lengths of the opposite sides. The resources in this lesson will help you learn to find the area and perimeter of a rectangle, circle, square, triangle and other two-dimensional shapes.
The apps, sample questions, videos and worksheets listed below will help you learn Perimeter.
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Volume is the quantity of three-dimensional space enclosed by a closed surface. The formulae for various shapes are: Volume of a Right Rectangular Prism, V = L W H where L is the length, W is the width and H is the height.; Volume of Prism or Cylinder, V = A h where A is the area of the base, h is the height; Volume Pyramid or Cone, V = 1 3 A h where A is the area of the base, h is the height.
The simplest (and most commonly used) area calculations are for squares and rectangles. To find the area of a rectangle multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.
The formula for the volume of a sphere is V = 4/3 πr³ where r is the radius.
Measure the length of one edge of the cube. Each edge of a cube is the same length. Count the number of edges of the cube. Every cube has 12 edges. Multiply the number of edges by the length of the edge to find the perimeter.
