scalene triangle - a triangle with all different side measurments, isosceles triangle - triangle with 2 equal side measurements, equilateral triangle - triangel with all 3 equal sides, acute triangle - triangle with 3 acute angles, obtuse triangle - triangle with 1 obtuse angle and 2 acute angles, right triangle - triangle with 1 right angle and 2 acute angles, the sum of all angles in a triangle is - 180 degrees,

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