Which type of triangle has three acute angles?

A triangle that has three acute angles is defined as an acute triangle. In geometry, an acute angle is an angle that measures less than 90 degrees, and for a triangle to be classified as an acute triangle, all three of its angles must meet this criterion.

When the measures of all angles in the triangle are less than 90 degrees, it indicates that the triangle does not extend outward at any angle, which is characteristic of an acute triangle. This property distinguishes acute triangles from the other types, such as obtuse triangles, which have one angle greater than 90 degrees, and right triangles, which contain one angle that is exactly 90 degrees.

Moreover, while a scalene triangle can have three angles, they could potentially be acute or any combination of acute, right, or obtuse angles. Therefore, the specific classification that focuses exclusively on the presence of three acute angles would be an acute triangle, making it the correct answer.