Question: Which of the following triangles is similar to a triangle with angles 30°, 60°, and 90°?

Options:

1. 30°, 60°, 90°
2. 45°, 45°, 90°
3. 60°, 30°, 90°
4. 90°, 30°, 60°

Correct Answer: 30°, 60°, 90°

Solution:

Triangles are similar if they have the same angles. The triangle with angles 30°, 60°, and 90° is similar to itself.