Depends on the number of sides. If the radius is r, then
If there are n sides, then
each side is s = 2rsin(180/n)°
the apothem is a = r cos(180/n)°
thus, the perimeter is p = ns
the area is A = 1/2 ap
Find the perimeter and area of the regular polygon with a radius of 4 inches.
1 answer