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S2 Mathematics

Question post on Wed, 07/09/2016 1:26pm

Ender · Answer 1 · Post on Wed, 07/09/2016 4:05pm

Ender Post on Wed, 07/09/2016 4:05pm

Remember Interior angle + Exterior angle = 180^o

1u + 9u = 180^o
u = 180/10 = 18

Exterior angle is 1u = 18^o

n = 360/18 = 20 sides.