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ella [17]
3 years ago
7

Find the area of a circle with the diameter of 3 centimeters. Use 3.14 for pi

Mathematics
1 answer:
Ket [755]3 years ago
3 0
The equation for the area of circle is:
A =  \pi  r^{2}
where r = radius.

The radius of a circle is 1/2 its diameter. Since you know the diameter is 3cm, its radius must be 3cm/2 = 1.5cm. 

Now just plug r=1.5 into the equation for the area of the circle to find the area:
A = \pi r^{2}
A = \pi (1.5)^{2}
A = 7.07 cm^{2}

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