The equation for the area of a circle is pi multiplied by the radius squared, i.e.
Area = (pi) x r^2
, where r = radius, which is the distance from the centre of a circle to the side, i.e. in this case 10cm. The radius is the same as the diameter divided by 2.
So for this case, A = (pi) x (10)^2 ≈ 3.14 x 10 x 10 = 3.14 x 100 = 314 cm^2
So the final answer is 314 centimetres squared