2021
Mathematics
JAMB
Each of the interior angles of a regular polygon is 140°. How many sides has the polygon?
A.
9
B.
8
C.
7
D.
5
Correct Answer: 9
Explanation
Each interior angle = ((n−2)180)/n 140 = ((n−2)180)/n Cross multiply: 140n = 180n - 360 40n = 360 n = 9 sides ( A Nonagon)
Each interior angle = ((n−2)180)/n 140 = ((n−2)180)/n Cross multiply: 140n = 180n - 360 40n = 360 n = 9 sides ( A Nonagon)THIS WEEK's
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