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 Related Terms
 Triangle, Obtuse:  A triangle with only one obtuse angle.
Triangle, Acute: A triangle with three acute angles.
Triangle, Right: A triangle with only one right angle.
Triangle, Equiangular: A triangle with three equal angles.
Triangle, Equilateral: A triangle with three equal sides.
Triangle, Scalene: A triangle with no equal sides.
Triangle, Isosceles: A triangle with only two equal sides.
Obtuse Angle: An obtuse angle is greater than 90 degrees but less than 180 degrees.
Triangle: A polygon with three sides.