The size of an exterior angle of a regular polygon is 40^circ Therefore, the polygon has __ sides. 4 8 C 9 10

To find the number of sides of a regular polygon given the size of its exterior angle, we can use the formula:<br /><br />Number of sides = 360° / Exterior angle<br /><br />In this case, the exterior angle is given as 40°. Plugging this value into the formula, we get:<br /><br />Number of sides = 360° / 40° = 9<br /><br />Therefore, the polygon has 9 sides.