If a triangle has a right angle, it is classified as what type of triangle?

A triangle that has a right angle is classified as a right triangle. A right triangle is specifically defined by the presence of one angle that measures exactly 90 degrees. This characteristic is distinct from other types of triangles.

Acute triangles have all angles measuring less than 90 degrees, while obtuse triangles have one angle that measures greater than 90 degrees. Isosceles triangles are defined by having at least two sides of equal length, which can occur in both acute and obtuse triangles, but does not necessarily indicate the presence of a right angle.

Thus, the correct classification for a triangle with a right angle is indeed a right triangle, highlighting its unique property among the various types of triangles.