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WAEC Mathematics 2012 Paper
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© africaexams.com
Question : 27
Total: 49
The sum of the interior angles of regular polygon is 1800
o
. How many sides has the polygon?
16
12
10
8
Validate
Solution:
Sum = (n - 2)180
1800 = (n - 2)180
divide both sides by 180
o
1800
180
= (n - 2)
180
180
10 = n - 2
10 + 2 = n
n = 12
© africaexams.com
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