angles that measure 90 degrees.
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An acute angled triangle, right angled triangle or obtuse angled triangle.
An obtuse angled triangle is wider than a right angled triangle. It has 180 degree angles.
a scalene can be a right-angled triangle or a obtuse angled triangle or a acute angled triangle depending on the angles of the triangle.
The sum of the interior angles of any triangle is 180 degrees. Whether or not it is right angled is irrelevant.
Any of the above: you can have a right-angled isosceles (not isoscles!) triangle, or an obtuse-angled one or an acute angled-one.