The diameter of a circle X is 18 cm the diameter of circle Y is 31 cm which circle has the greater area and by how much you 3.14 for pie

Area of a circle = (pi) (radius squared)

A of Circle X = (3.14) (18cm/2) squared

We need to divide the diameter in half to get the radius.

A of Circle X = (3.14) (9) squared

A of Circle X = (3.14) (81)

A if Circle X = 254.34 cm

A of Circle Y = (3.14) (31cm/2) squared

We need to divide the diameter in half to get the radius.

A of Circle Y = (3.14) (15.5) squared

A of Circle Y = (3.14) (240.25)

A if Circle Y = 754.39 cm

Find the difference in Area:

=Circle Y - Circle X

=754.39 - 254.34

=500.05 cm difference

Circle Y has the greater area of 754.39. It it greater than Circle X by 500.05 cm