1. The problem asks to identify the type of special triangle given one angle of 30° and a right angle (90°). 2. A triangle with angles 30°, 60°, and 90° is a well-known special right triangle called the 30°-60°-90° triangle. 3. This triangle has side length ratios of $1 : \sqrt{3} : 2$, where the side opposite 30° is the shortest, opposite 60° is $\sqrt{3}$ times the shortest, and the hypotenuse is twice the shortest side. 4. The other options, Obtuse, Isosceles, and 45°-45°-90°, do not match the given angle configuration. 5. Therefore, the triangle shown is a 30°-60°-90° triangle.