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right triangle
obtuse triangle 25 110 45 angles
equilateral triangle sides of 7
acute triangle 40 60 80 angles
equilateral triangle
scalene triangle 8x12x7
4 by 4 by 6 triangle
acute triangle 70 60 50 angles
obtuse triangle
isosceles triangle
isosceles triangle
equilateral triangle

Different types of Triangles

​Test your knowledge  of triangles. Roll over each different type of triangle to find out what type it is.

​Triangles are classified by side length and angle measure


Scalene triangle

Three different side lengths

Three different angle measures

Isosceles triangle

At least two congruent sides

At least two congruent angles

Equilateral triangle

Three congruent sides

Three congruent angles The angle measure equals 60 degrees

Acute triangle

Triangle with three angles that measure less than 90 degrees

Obtuse triangle

Triangle with one angle greater than 90 degrees

Right triangle

Triangle with one right angle ( 90 degrees)

The other two angles are complementary