The perimeter is the total distance around the edge of a 2D shape. Examples of units of distance are millimetres (mm), centimetres (cm) and metres (m). The perimeter of any 2D shape can be found by ...

The team behind numerous math-oriented books, including Mystery Math: A First Book of Algebra and Fun with Roman Numerals, turns to length, width, and depth using a cast of digitally rendered monsters ...

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