Question

2 The diagram shows a
piece of coin in the
shape of a regular
polygon with 12 sides.
Determine the size of
(a) intenor angle of the
coin,
(b)<OAB.




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Answer 1

Diagram? There is no diagram given.

a.

$i = \frac{180(n - 2)}{n}$

$i = \frac{180(12 - 2)}{12} = \frac{180(10)}{12} = \frac{1800}{12} \\ i = 150\degree$

Cannot solve b without the diagram.