 # Types of Triangles. Angles The angles in a triangle add up to 180 0 60 o + 60 o + 60 o = 180 0.

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Types of Triangles

Angles The angles in a triangle add up to 180 0 60 o + 60 o + 60 o = 180 0

Triangles can be classified in two ways You can name triangles by their angles You can name triangles by their sides

Acute Triangle All angles measure less than 90º

Right Triangle One angle measures exactly 90º

Obtuse Triangle One angle measures more than 90º

Scalene Triangle All sides are different lengths

Isosceles Triangle Two sides have the same length

Equilateral Triangle All sides have the same length

Practice Can you name each triangle by its sides and its angles? Scalene and Acute Isosceles and Right Scalene and Obtuse

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