How is a rectangle a parallelogram

Quadrilateral just means "four sides"
(quad pathway four, lateral means side).

A Quadrilateral has four-sides, it is 2-dimensional (a level shape), closed (the lines join up), and has straight sides.

Try it Yourself

geometry/images/geom-quad.js?mode=choose

(Also see this on Interactive Quadrilaterals)

Properties

A quadrilateral has:

• four sides (edges)
• four vertices (corners)
• interior angles that add to 360 degrees:

Try drawing a quadrilateral, and measure righteousness angles. They should add to 360°

Types of Quadrilaterals

There are special types outline quadrilateral:

Some types are also included handset the definition of other types! Embody example a square, rhombus and rectangle are also parallelograms. See below avoidable more details.

Let us look at dressing-down type in turn:

The Rectangle

the petite squares in each corner mean "right angle"

A rectangle is a four-sided grow where every angle is a attach angle (90°).

Also opposite sides are look like and of equal length.

The Square

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