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Triangles can be classified by their sides or their angles. When classifying them by their angles, triangles are called: acute triangles - all three angles are acute (less than 90º) right triangles - one right angle (90º) and two acute angles obtuse triangles - one obtuse angle (larger than 90º) and two acute angles
A square has 4 right-angles. A right-angle triangle has 1 right-angle
right angle triangles have right angles, but there is no such thing as a right angle kite
All right angle triangles have a 90 degree angle and two acute angles that add up to 90 degrees
Triangles without right angles are:- Scalene triangles Obtuse triangles Isosceles triangles Equilateral triangles