Question

2 The diagram shows a

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.