Geometry

Question Analysis:
This question applies exterior angles to a real-world scenario (a ladder against a wall).

Key Concept Explanation:
The exterior angle is supplementary to the adjacent interior angle (they add to 180°).

Step-by-Step Solution:
The interior angle between the ladder and ground is 75°.
The exterior angle = 180° – 75° = 105°.

Common Mistakes:
Misidentifying which angle is interior vs. e...