What number is 26% of 52

Take .26 • 52 = 13.52 

So 26% of 52 = 13.52

Sum of Interior Angles = (Number of Sides -2) • 180 degrees

Number of Sides = (Sum of Interior Angles / 180 degrees) + 2

Number of Sides = (1,080 / 180) +2

Number of Sides = 6 + 2

Number of Sides = 8

a) It is an octagon

b) Each interior angle = 1,080 / 8 = 135 degrees

c) Each Exterior Angle = (360 degrees) ÷ (Number of Sides)

Each Exterior Angle = 360/8

Each Exterior Angle = 45 degrees

Source:
http://www.1728.org/polygon.htm