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Published byKatrina Boyd Modified over 8 years ago
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Angles in a Triangle By Mr G
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Definition Polygon Polygon – a closed many straight-sided figure.
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Definition Angle Angle – two rays that meet at a common end point.
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Definition Degree Degree – a unit of measurement of an angle or arc, represented by the symbol º. 30º
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Definition Triangle Triangle – a polygon with 3 angles and 3 straight sides.
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Property of triangles The The sum of all the angles equals 180º degrees. 90º30º 60º
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Property of triangles The sum of all the angles equals 180º degrees. 90º30º 60º 90º 30º + 180º
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Property of triangles The sum of all the angles equals 180º degrees. 90º 50º 40º 90º 50º + 180º
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Property of triangles The sum of all the angles equals 180º degrees. 60º + 180º 60º
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What is the missing angle? 70º ? + 180º 70º ?
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What is the missing angle? 90º 30º ? + 180º 30º90º ?
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What is the missing angle? 60º ? + 180º 60º ?
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What is the missing angle? 30º 78º ? + 180º 78º30º ?
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What is the missing angle? 40º ? + 180º 40º ?
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