Question

A 42" diameter table needs a tablecloth that hangs off the edge 8". What is the area of the tablecloth? Use 3.14 for π.

Answer 1

The diameter of the table is 42 inches. The radius of the table is half of the diameter of the table, so the radius of the table is 42/2 = 21 inches. 

Add on 8 inches to the table radius to get: 21+8 = 29

So the radius of the table cloth is r = 29

Plug this into the area of a circle formula

A = pi*r^2
A = pi*29^2
A = pi*841
A = 841pi
A = 841*3.14
A = 2640.74

The approximate area of the table cloth is 2640.74 square inches.

Answer 2

The area of the table cloth is 2,640.74 iches