WAEC - Mathematics (2014 - No. 34)

Each exterior angle of a polygon is 30o. Calculate the sum of the interior angles
540o
720o
1080o
1800o

Explanation

number of sides = \(\frac{360^o}{\theta} = \frac{360^o}{306o}\)

n = 12o

Sum of interior angle = (n - 2) 180o

(12 - 2) 180v = 10 x 180o

= 1800o

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