Question 942173
For polygon B with interior angle 168 degrees, the exterior angle=180 degrees-168 degrees=12 degrees. The sum of externior angles of a polygon is 360 degrees, so 360 degrees /12 degrees = 30 sides for polygon B. The ratio of the number of sides of A:B is 1:3 so polygon A would have 10 sides.  With a total of 360 degrees, each exterior angle would be 360 degrees/10=36 degrees and each interior angle of polygon A would be (180-36) degrees or 144 degrees.