Greater than zero, less than 90 - Acute
Equal to 90 - Right
Greater than 90, less than 180 - Obtuse
Equal to 180 - Straight
Greater than 180, less than 360 - Reflex
(all measures are in degrees).
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They are: equilateral, isosceles, obtuse, scalene and right angle triangles
isolies
Equilateral: 3 equal sides and 3 equal angles Isosceles: 2 equal sides and 2 equal angles Right angle: a 90 degree angle and 2 acute angles and sides that vary in length Obtuse: an obtuse angle and 2 acute angles and sides that vary in length Scalene: 3 acute angles and 3 different side lengths
we identify it when it has measure ment in its vertex
One way of classifying triangles is by the number of congruent sides (angles). A triangle is equilateral if all its sides are equal. All its angles will also be equal. A triangle is isosceles if two of its sides are equal. The angles at the end of the third side will be equal to one another. A triangle is scalene if all three sides are of different length. In this case, all three angles will also be different.