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Can an isosceles triangle be obtuse?

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An obtuse triangle is a triangle that has one obtuse angle, meaning an angle that is greater than 90 degrees but less than 180 degrees. An isosceles triangle is a triangle that has at least two equal sides. read more

So we conclude that the isosceles Obtuse Triangle can be formed. In the same way, we say that it can be shown as follows. If one of the angle of the triangle is obtuse , say 100 degree, then the sum of remaining two angles will be ( 180 – 100 = 80 ) degrees. read more

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Gallery Obtuse Isosceles Triangles
Source: bianoti.com