An exterior angle of a regular polygon is 72°. (i) what is the size of each interior angle of the polygon?
(ii) Find the number of sides of the polygon.

Exterior angle = 72⁰

As polygon is regular , each interior angle = 180⁰ - 72⁰ = 108⁰

Number of sides :

As the sum of exterior angles is 360⁰ :

n × 72⁰ = 360⁰

n = 360/72 = 5

Steps to solve:

y = 5x - 4 for x = -6

~Substitute

y = 5(-6) - 4

~Simplify

y = -30 - 4

~Subtract

y = -34

After solving, the answer is D (-6, -34)

Best of Luck!