Question on: JAMB Mathematics - 2009
A regular polygon has 150o as the size of each interior angle. How many sides does it have?
A
12
B
10
C
9
D
8
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Correct Option: A
Sum of interior angles of a polygon = each interior ∠x n
(n-2)180 = 150 x n
180n - 360 = 150n
180n-150n = 360
30n = 360
n = 360/30
n = 12 sides
(n-2)180 = 150 x n
180n - 360 = 150n
180n-150n = 360
30n = 360
n = 360/30
n = 12 sides
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