Geometry

Question Analysis:
This problem tests understanding of interior angle sums in irregular polygons and the ability to calculate a missing angle when other angles are known.

Key Concept Explanation:
For any n-sided polygon, the sum of interior angles equals (n - 2) × 180°. This rule applies to both regular and irregular polygons.
A hexagon (6 sides) will always have interior angles summing to 720°, regardless of whether it's regular or irregular.

Step-by-Step Solution:
Calculate total angle sum for hexagon:
(6 - 2) × 180° = 720°
Sum the five given angles:
110° + 120° + 130° + 140° + 150° = 650°
Find the sixth angle:
720° - 650° = 70°

Common Mistakes:
Incorrectly summing the given angles
Usin...