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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


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°).

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


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—Wolfram Language Documentation


Rectangle[{xmin, ymin}, {xmax, ymax}] represents an axis-aligned filled rectangle from {xmin, ymin} to {xmax, ymax}. Rectangle[{xmin, ymin}] corresponds to a ...

Rectangle Sides, Diagonals, and Angles -properties, rules by Example


Properties and rules of Rectangles, explained with examples, illustrations and practice problems.

Rectangle -- from Wolfram MathWorld


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

Rectangle - math word definition - Math Open Reference


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).

Area of a Rectangle - Math Goodies


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  ...

IXL - Find the area of rectangles and squares (3rd grade math ...


Fun math practice! Improve your skills with free problems in 'Find the area of rectangles and squares' and thousands of other practice lessons.

Create rectangles with a given area | Count unit squares to find area ...


Practice finding the area of rectangles by counting unit square. Create rectangles with a given area by covering unit squares.

a parallelogram having four right angles.
Source: Dictionary.com
rectangles | Define rectangles at Dictionary.com
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