A regular polygon is shown.

12 sided regular polygon

Determine the measure of one of its angles.

a) 2,160°

b) 1,800°

c) 165°

d) 150°

To find the measure of one angle in a regular polygon, we use the formula:

Angle measure = (180(n-2))/n

where n is the number of sides in the polygon.

For a 12-sided regular polygon:

Angle measure = (180(12-2))/12
= (180(10))/12
= 150°

Therefore, the measure of one angle in a 12-sided regular polygon is 150°.

The correct option is d) 150°.