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**Saxon 6/5 Lesson 114 Pictures from www.mathisfun.com**

Area Saxon 6/5 Lesson 114 Pictures from

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Quadrilaterals Quadrilateral simply means “four sides”, because quad means four and lateral means side. Any four-sided 2-dimensional shape made of straight lines is a quadrilateral.

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**Properties of Quadrilaterals**

Quadrilaterals have four sides (edges). Quadrilaterals have four vertices (corners). The interior angles add up to 360 degrees.

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**Defined Quadrilaterals**

There are certain quadrilaterals that have been defined. We’ve assign specific properties to these types of quadrilaterals. Some of the defined quadrilaterals are parallelogram, rectangle, rhombus, square, and trapezoid.

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**Rectangle The rectangle is a four-sided polygon.**

Every angle measures 90 degrees (a right angle). Opposite sides are parallel. Opposite sides are equal length.

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**Rhombus The rhombus is a four-sided polygon.**

All sides have equal length. Opposite sides are parallel. Opposite angles are equal. Diagonals will bisect each other at right angles.

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**Square The length of every side of a square is equal.**

The measure of every angle is the same. A square is also a rectangle since all angles measure 90 degrees and opposite sides are equal and parallel. A square is also a rhombus since opposite sides are parallel and opposite angles are equal.

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**Parallelogram A parallelogram is a four-sided polygon.**

Opposite sides are parallel and equal in length. Opposite angles are equal. Squares, rectangles, and rhombuses (rhombi) are all parallelograms.

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**Trapezoid A trapezoid is a four-sided polygon.**

It has one pair of opposite sides parallel. A trapezoid is described as isosceles when the opposite sides that are not parallel are equal in length and angles are equal.

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