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All triangles have 3 sides and 3 interior angles that add up to 180 degrees:-

Right angle triangle has a 90 degree angle and 2 acute angles

Scalene triangle has 3 different acute angles

Obtuse triangle has 1 obtuse angle and 2 different acute angles

Isosceles triangle has 2 equal angles and a 3rd angle that all add up to 180 degrees

Equilateral triangle has 3 equal 60 degree angles

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Q: Classification of triangles according to the interior angles?
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