A rectangular polygon has 150o as the size of each interior angle. How many sides has the polygon?

Assessment: JAMB UTME - Mathematics - 1993 Subject: General Mathematics

Question 1 Report

A rectangular polygon has 150o as the size of each interior angle. How many sides has the polygon?
Answer Details
A rectangular polygon has each interior angle to be 150o
let the polygon has n-sides
therefore, Total interior angle 150 x n = 150n
hence 150n = (2n - 4)90
150n = 180n - 360
360 = (180 - 150)n
30n = 360
n = 12

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