3) calculate the size of each exterior angle in:
(a) a regular 9-sided polygon (b) a regular 40-sided polygon

40° and 9°

Step-by-step explanation:

The sum of the exterior angles of a polygon = 360°

If the polygon is regular then the measure of each exterior angle is

← where n is the number of sides

(a) for a regular 9 sided polygon

exterior angle = = 40°

(b) for a regular 40 sided polygon

exterior angle = = 9°

step-by-step explanation:

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step-by-step explanation: