Work out the area of a circle with diameter 1.8cm. Take \pi to be 3.142 and give your answer in 1 decimal place.

Question

work out the area of a circle with diameter 1.8cm. Take
`\pi` to be 3.142 and give your answer in 1 decimal place.

Answer 1

Area of a circle is pi x r ^2

R = diameter/2

R = 1.8/2 = 0.9

Area = 3.142 x 0.9^2

Area = 2.5 square cm.