Triangle - 3 sides, 3 angles, obtuse - between 90 and 180 degrees, right angle - exactly 90 degrees, acute - less than 90 degrees, reflex - more than 180 degrees, isosceles - 2 equal sides, 2 equal angles, equilateral - 3 equal sides, 3 equal angles, scalene - no equal sides or angles, angles - are measured in degrees, protractor - used for measuring angles,

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