Your question contains the answer. It is a 'right' triangle.
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That would be a right triangle. Any triangle that has a right angle in it is a right triangle.
A "right" triangle, so called because it contains a "right angle".
A scalene or any other kind of triangle can have no more than one right angle.
Angle in triangle abc measure 27, 73 and 80, what kind of triangle is abc
1 triangle = 3 sides, no matter what kind of triangle it is 5 triangles = 3 sides each = 15 sides