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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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