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Can a scalene triangle be obtuse? Is an equilateral triangle always acute?

Arjit drew an isosceles right angled triangle on the board. What is the measure of the base angle?

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Calvin Lin**

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The polygonal path connecting points A and B forms 7 equilateral triangles.

If the distance between point A to point B is 20 units, then how long is the distance of the path (in units)?

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Natanael Flores**

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Paola Ramírez**

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Which non-degenerate triangle cannot have one of its angles as \({91}^\circ\)?

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Ashish Siva**

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Which non-degenerate triangle can have one of its angles as \({89}^{\circ}\)?

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Ashish Siva**

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