Quadrilaterals. Copyright © 2000 by Monica Yuskaitis Definition Polygon – a closed many straight-...

Quadrilaterals

Definition• Polygon – a closed many straight-

sided figure.

Definition• Angle – two rays that meet at a

common end point.

Definition• Degree – a unit of measurement of

an angle or arc, represented by the symbol º.

Definition• Quadrilateral – a polygon with 4

angles and 4 straight sides.

Quadrilateral Family

parallelogramrectangle

rhombus square

trapezoid

Property of quadrilaterals• The sum of all the angles equals

360º degrees.

Property of Quadrilaterals• The sum of all the angles equals

360º degrees.

90º90º90º90º+

360º degrees.

90º90º90º90º+

360º degrees.

70º70º

110º110º+360º

360º degrees.

115º65º

65º65º

115º115º+360º

What is the missing angle?

90º90º90º

?360º

70º70º

110º?+

115º65º

?65º65º

115º?+

90º90º90º

?+360º

58º81º

109º?+

360º81º58º

109º?

Quadrilaterals. Copyright © 2000 by Monica Yuskaitis Definition Polygon – a closed many straight-...

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