Let be the length of a side of a regular polygon of sides and be the center of the polygon.
As there are sides, similar triangles are formed.
Let be one of the triangles, then
Area of the regular polygon area of
The area of the regular polygon
the area of the regular polygon
Also, the perimeter of the polygon
Find the cost of carpeting an octagonal floor with sides measuring if the carpet costs Rs. per square meter.
Area square meters.
the cost of carpeting Rupees.