The sum of the interior angles of any triangle is 180 degrees. Whether or not it is right angled is irrelevant.
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The interior angles of a triangle add to 180 degrees. This is true for any triangle, whether it is obtuse angled, right angles or acute.
No. Only 2 altitudes can intersect at a point. * * * * * True but even they do not meet in the interior. The altitudes of a right angles triangle meet at the right angled vertex. The vertex is at the boundary of the triangle, not in the interior.
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.