Question

the diagram shows three sides of a polygon
each interior angle off the regular polygon is 140'
work put the number of sides then polygon has.

Answer 1

well if the interior angle is 140 the exterior angle is 40

and there is a postulate that says the exterior angles of any polygon sum to 360 degrees,

so divide 360 by the exterior angle to find the number of angles in the polygon which is the same as the number of sides.

Answer 2

thank you