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Triangles I - • The sum of all the angles equals 180º...

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Triangles I by Mrs. Martin
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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. 30º
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Copyright © 2000 by Monica Yuskaitis Definition Triangle – a polygon with 3 angles and 3 straight sides.
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Copyright © 2000 by Monica Yuskaitis Property of triangles The sum of all the angles equals 180º degrees . 90º 30º 60º
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Copyright © 2000 by Monica Yuskaitis Property of triangles The sum of all the angles equals 180º degrees . 90º 30º 60º 60º 90º 30º + 180º
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Copyright © 2000 by Monica Yuskaitis Property of triangles
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Unformatted text preview: • The sum of all the angles equals 180º degrees . 90º 50º 40º 40º 90º 50º + 180º Copyright © 2000 by Property of triangles • The sum of all the angles equals 180º degrees . 60º 60º 60º + 180º 60º 60º 60º Copyright © 2000 by What is the missing angle? 70º 70º ? + 180º 70º 70º ? Copyright © 2000 by What is the missing angle? 90º 30º ? + 180º 30º 90º ? Copyright © 2000 by What is the missing angle? 60º 60º ? + 180º 60º 60º ? Copyright © 2000 by What is the missing angle? 30º 78º ? + 180º 78º 30º ? Copyright © 2000 by What is the missing angle? 40º 40º ? + 180º 40º 40º ?...
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