Scalene triangle, Isosceles triangle, Equilateral triangle, A scalene triangle has - different side lengths, and all angles are different in size., An isosceles triangle has - two sides that are equal in length and two angles that are equal in size., An equilateral triangle has - three sides that are equal in length and three equal angles. Each of the angles in an equilateral triangle is 60º, Acute triangle, Right angle triangle, Obtuse angle triangle, A right angled triangle has - one of the internal angles equal to 90º, An obtuse angled triangle has - one of the internal angles is between 90º and 180º, An acute triangle has - none of the angles are equal but they are all acute (all between 0º and 90º), The internal angles of a triangle equal - 180 degrees,

Triangle types

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