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(2n-4)*90/n=5*360/n
(2n-4)*90=1800
2n-4=20
2n=24
n=12
(2n-4)*90/n=150
360/n=30
i) 150
ii) 30
iii) 12
(2n-4)*90=1800
2n-4=20
2n=24
n=12
(2n-4)*90/n=150
360/n=30
i) 150
ii) 30
iii) 12
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