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

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Presentation on theme: "Quadrilaterals I by Monica Yuskaitis. Copyright © 2000 by Monica Yuskaitis Definition Polygon – a closed many straight- sided figure."— Presentation transcript:

1 Quadrilaterals I by Monica Yuskaitis

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


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