Question

(LOOK AT IMAGE)

Answer 1

Answer: 9

Step-by-step explanation:

The interior angle of the 8-sided polygon is

$\frac{180(8-2)}{8}=135^{\circ}$

The interior angle of the 10-sided polygon is

$\frac{180(10-2)}{10}=144^{\circ}$

Taking the difference, we get $b=9^{\circ}$