Geometry

Question Analysis:
This question assesses knowledge of polygon angle sums, specifically targeting quadrilaterals.
It requires recall of the general polygon angle sum formula and its application to four-sided figures.

Key Concept Explanation:
The sum of interior angles in any polygon follows the formula (n - 2) × 180°, where n represents the number of sides.
For quadrilaterals (n = 4), this becomes (4 - 2) × 180° = 2 × 180° = 360°.

Step-by-Step Solution:
Apply the polygon angle sum formula:
(Number of sides - 2) × 180°
For quadrilaterals: (4 - 2) × 180° = 2 × 180° = 360°

Common Mistakes:
Students often confuse the formula with that for triangles or forget to subtract 2 from the number of sides.
Some might mistakenly use n × 180° instead of (n - 2) × 180°.

Summary: