
Concept explainers
Prove this formula for n = 3 using mathematical induction and geometry.

Answer to Problem 16PPS
Summing these we get
Explanation of Solution
Given:
According to the interior angle sum formula, if a convex
Step 1: When
When a polygon has 3 sides or 3 vertices, there are 180 degrees. The statement is true for n = 3
Step 2: Assume that the statement is true for
Step 3: Consider a convex polygon with n + 1 vertices. Since
Summing these we get
Thus, summing these we get
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