how much is each of the angle of a 12 sided regular polygon ?
how much is each of its external angle ?
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formula of interior angle of a regular n sided polygon = 180(n-2)/n
for 12 sided polygon put n = 12
each interior angle = 180*10/12 = 150
interior angle + external angle = 180
each external angle = 180 - 150 = 30
for 12 sided polygon put n = 12
each interior angle = 180*10/12 = 150
interior angle + external angle = 180
each external angle = 180 - 150 = 30
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