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Your question contains the answer. It is a 'right' triangle.

Q: What kind of triangle has one right 90degrees angle?

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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

Related questions

A right triangle is a triangle with a right angle.a right triangle is a triangle with 1 side as a right angle

A right triangle has a right angle (thus called a right triangle), 90 degrees

That would be a right triangle. Any triangle that has a right angle in it is a right triangle.

If one angle is a right angle, it is a right triangle. If one angle is an obtuse angle, it is an obtuse triangle. If there are no right nor obtuse angle then it is an acute triangle.

right angle triangle

A right-angle triangle.

A right-angle triangle must have one corner of 90 degrees.

an equaladderal triangle

If you mean angles then it is a right angle triangle or an isosceles right angle triangle

A right triangle. (This is a joke.) A right triangle is one that has a 90o angle.

right triangle ( triangles with a right angle)

an isosceles right triangle