Quadrilaterals I by Monica Yuskaitis.

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Presentation transcript:

Quadrilaterals I by Monica Yuskaitis

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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