Geometry

Question Analysis:
This question combines right triangle properties with the Exterior Angle Theorem.

Key Concept Explanation:
In a right triangle, the two non-right angles are complementary (sum to 90°).
The exterior angle at a vertex equals the sum of the two non-adjacent interior angles.

Step-by-Step Solution:
Angle Y = 90° (right angle), angle X = 35°.
Exterior angle at Z = angle X + angle Y = 35° + 90° = 125°.

Common Mistakes:
Using the wrong angles in...