Question

in an obtuse angled triangle one of its angle is

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Answer 1

An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles. Since a triangle's angles must sum to 180° in Euclidean geometry, no Euclidean triangle can have more than one obtuse angle

Answer 2

Is an obtuse angle 90°-180°