Question: Two triangles are similar if their corresponding angles are equal. If triangle DEF is similar to triangle XYZ, and angle D = 30°, what is angle X?

Options:

1. 30°
2. 60°
3. 90°
4. 120°

Correct Answer: 30°

Solution:

Since the triangles are similar, corresponding angles are equal. Therefore, angle X = angle D = 30°.