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Classifying Triangles. Students will classify triangles using the lengths of the sides and the angles. S. Calahan October 2010. Classifying triangles by angles. Acute triangle – all of the angles are acute. Classifying triangles by angles. Obtuse triangle – one angles is obtuse.
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Classifying Triangles Students will classify triangles using the lengths of the sides and the angles. S. Calahan October 2010
Classifying triangles by angles Acute triangle – all of the angles are acute
Classifying triangles by angles Obtuse triangle – one angles is obtuse
Classifying triangles by angles • Right triangle – one angles is 90°
Classify the triangle by it’s angles 85° 55° 40°
Right Acute Triangle
Right Right triangle
Right Obtuse Triangle
Classify triangles by sides • Scalene triangle – no sides are congruent
Classify triangles by sides • Isosceles triangle – at least 2 sides are congruent.
Classify triangles by sides • Equilateral triangles – all sides of a triangle are congruent
Right Isosceles triangle
Right Scalene Triangle
Right Equilateral Triangle
Right Isosceles Triangle