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Quadrilaterals I by Monica Yuskaitis

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

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Copyright © 2000 by Monica Yuskaitis Definition Angle – two rays that meet at a common end point.

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Copyright © 2000 by Monica Yuskaitis Definition Degree – a unit of measurement of an angle or arc, represented by the symbol º. 90º

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Copyright © 2000 by Monica Yuskaitis Definition Quadrilateral – a polygon with 4 angles and 4 straight sides.

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Copyright © 2000 by Monica Yuskaitis Quadrilateral Family parallelogram rectangle rhombus square trapezoid

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Copyright © 2000 by Monica Yuskaitis Property of quadrilaterals The sum of all the angles equals 360º degrees. 90º

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Copyright © 2000 by Monica Yuskaitis Property of Quadrilaterals The sum of all the angles equals 360º degrees. 90º + 360º

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Copyright © 2000 by Monica Yuskaitis Property of Quadrilaterals The sum of all the angles equals 360º degrees. 90º + 360º

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Copyright © 2000 by Monica Yuskaitis Property of Quadrilaterals The sum of all the angles equals 360º degrees. 70º 110º 70º 110º 70º 110º + 360º

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Copyright © 2000 by Monica Yuskaitis Property of Quadrilaterals The sum of all the angles equals 360º degrees. 65º 115º65º 115º 65º 115º + 360º

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Copyright © 2000 by Monica Yuskaitis What is the missing angle? 90º ? ? 360º +

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Copyright © 2000 by Monica Yuskaitis What is the missing angle? 70º ? 110º 70º 110º ? + 360º

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Copyright © 2000 by Monica Yuskaitis What is the missing angle? 65º 115º65º ? 115º ? + 360º

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Copyright © 2000 by Monica Yuskaitis What is the missing angle? 90º ? ? + 360º

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Copyright © 2000 by Monica Yuskaitis What is the missing angle? 58º 81º 109º ? + 360º 81º58º 109º ?

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