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How to distinguish if a triangle is right angled, obtuse or acute on the basis of sides - Quora
What is an obtuse angle on a right-angled triangle called? Why
Do right triangles always contain one right-angle, two acute angles, and one obtuse angle? How would you prove that such triangles don't exist if they don't? - Quora
Do trigonometric functions only work for right triangles? - Quora
What Are The Properties Of 2D And 3D Shapes?
Can a triangle have 2 obtuse angles? Why or why not? - Quora
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How to prove that an obtuse angled triangle has no right angles - Quora
How many types of triangles are there in geometry? What are they called (e.g., obtuse, scalene, equilateral)? - Quora