Geometry

Question Analysis:
This question asks you to reverse-engineer the number of sides based on a known angle.
The main focus is using algebra to solve for n given a specific interior angle.

Key Concept Explanation:
Each interior angle of a regular n-gon is:
[(n − 2) × 180] / n
We set this equal to 168 and solve for n.

Step-by-Step Solution:
Let’s solve: (n − 2) × 180/n = 168
Multiply both sides by n:
180(n − 2) = 168n
180n − 360 = 168n
12n = 360
n = 30

Common Mistakes:
Plugging ...