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Common Core
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CCSS.Math.Content.3.G.A.1CCSS.Math.Content.4.G.A.2CCSS.Math.Content.5.G.B.3

A quadrilateral is a four- sided polygon with four angles.

• Four sides.
• Four vertices
• The interior add upto 360 degrees.

The five most common types of quadrilaterals are:

## Rectangle

A quadrilateral with four 90-degree angles. Also opposite sides are parallel and of equal length.

## Parallelogram

A quadrilateral with opposite sides parallel. Also opposite angles are equal.

## Square

A quadrilateral with four equal sides and four 90 degree angles. Also opposite sides are parallel.

## Rhombus

A parallelogram with four equal sides. Also opposite sides are parallel and opposite angles are equal.

## Trapezoid

A quadrilateral that has exactly two sides parallel.

## Kite

It has two pairs of sides. Each pair is made up of adjacent sides that are equal in length. The angles are equal where the pairs meet.

Summary
• A quadrilateral is a four- sided polygon with four angles.
• Four sides.
• Four vertices
• The interior add upto 360 degrees.
• The five most common types of quadrilaterals are:
• Rectangle: A quadrilateral with four 90-degree angles. Also opposite sides are parallel and of equal length.
• Parallelogram: A quadrilateral with opposite sides parallel. also opposite angles are equal.
• Square: A quadrilateral with four equal sides and four 90 degree angles. Also opposite sides are parallel.
• Rhombus: A parallelogram with four equal sides. Also opposite sides are parallel and opposite angles are equal.
• Trapezoid: A quadrilateral that has exactly two sides parallel.
• Kite: It has two pairs of sides. Each pair is made up of adjacent sides that are equal in length. The angles are equal where the pairs meet.

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