14-05-2020
Mathematics

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

Work out the area of a circle with diameter of 18cm take pi to be 3142 and give your answer to 1 decimal place class=

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14-05-2020

Answer:

A =2.5 cm^2

Step-by-step explanation:

The area of a circle is

A = pi r^2 where r is the radius

r = d/2 where d is the diameter

r = 1.8 /2 = .9

A = 3.142 ( .9)^2

A=2.54502

Round to 1 decimal place

A =2.5 cm^2

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