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## Rectangle

en.wikipedia.org/wiki/Rectangle

In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular ...

## Rectangle - Math is Fun

www.mathsisfun.com/geometry/rectangle.html

Rectangle. (Jump to Area of a Rectangle or Perimeter of a Rectangle). A rectangle is a four-sided flat shape where every angle is a right angle (90°).

## Definition of Rectangle - Math is Fun

www.mathsisfun.com/definitions/rectangle.html

Rectangle. A 4-sided flat shape with straight sides where all interior angles are right angles (90°). Also opposite sides are parallel and of equal length. Example:  ...

## Rectangle - math word definition - Math Open Reference

www.mathopenref.com/rectangle.html

The rectangle, like the square, is one of the most commonly known quadrilaterals . It is defined as having all four interior angles 90° (right angles).

## Cool math .com - The Properties of a Rectangle (perimeter, area ...

www.coolmath.com/reference/rectangles

Definitions and formulas for the perimeter of a rectangle, the area of a rectangle, how to find the length of the diagonal of a rectangle, properties of the diagonals ...

## Rectangle -- from Wolfram MathWorld

mathworld.wolfram.com/Rectangle.html

Rectangle. DOWNLOAD Mathematica Notebook EXPLORE THIS TOPIC IN the MathWorld Classroom Rectangle. A closed planar quadrilateral with opposite ...

## Rectangle - Area and Perimeter of a Rectangle - Quatr.us

quatr.us/math/geometry/rectangle.htm

A rectangle is a flat shape, in one plane, defined by four points at the four corners . A rectangle has two sides of equal length opposite each other, and two other ...

## IXL - Area of rectangles (3rd grade math practice)

Fun math practice! Improve your skills with free problems in 'Area of rectangles' and thousands of other practice lessons.

## Area of a Rectangle - Math Goodies

www.mathgoodies.com/lessons/vol1/area_rectangle.html

The area of a polygon is the number of square units inside the polygon. To understand the difference between perimeter and area, think of perimeter as the  ...

## Rectangle | Definition of Rectangle by Merriam-Webster

www.merriam-webster.com/dictionary/rectangle

geometry : a four-sided shape that is made up of two pairs of parallel lines and that has four right angles; especially : a shape in which one pair of lines is longer  ...