Types of Triangles
Angles The angles in a triangle add up to 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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