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Classifying Triangles Students will classify triangles using the lengths of the sides and the angles. S. Calahan October 2010

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Classifying triangles by angles Acute triangle – all of the angles are acute

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Classifying triangles by angles Obtuse triangle – one angles is obtuse

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Classifying triangles by angles Right triangle – one angles is 90°

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Classify the triangle by it’s angles 85° 55°40°

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Right Acute Triangle

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Classify the triangle by it’s angles 60° 30°

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Right Right triangle

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Classifying the triangle by it’s angles 110°

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Right Obtuse Triangle

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Classify triangles by sides Scalene triangle – no sides are congruent

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Classify triangles by sides Isosceles triangle – at least 2 sides are congruent.

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Classify triangles by sides Equilateral triangles – all sides of a triangle are congruent

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Classify triangles by sides

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Right Isosceles triangle

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Classify triangles by sides

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Right Scalene Triangle

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Classify the triangle using the sides

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Right Equilateral Triangle

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Classify the triangle using the sides

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Right Isosceles Triangle

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