Classify the triangle whose angle measures are 30°, 60°, and 90°. 

The correct answer is: Right

Given, the angles of the triangle are 30°, 60°, and 90°.
A right-angled triangle is a triangle, that has one of its interior angles equal to 90 degrees or any one angle is a right angle.
As one of the angles is 90°. 
Therefore, the triangle whose angle measures are 30°, 60°, and 90° is Right triangle.