A rectangular polygon has 150o as the size of e... - JAMB Mathematics 2009 Question
A rectangular polygon has 150o as the size of each interior angle. How many sides does it has?
A
12
B
10
C
9
D
8
correct option: a
x + 150o = 180o (sum of angle on straight line)
x = 180o - 150o , x = 30o
number of sides (n) = \(\frac{360}{3}\)
= 12
x = 180o - 150o , x = 30o
number of sides (n) = \(\frac{360}{3}\)
= 12
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