How do you find the area of a circle in terms of pi if the diameter is 2.1m?

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Answer 1 · 2015-09-08T15:46:53

The area of the circle is $1.1025 π$ $1.1025 pi$ square meters.

The formula for the area of a circle is:

$A r e a = π r^{2}$ $Area = pir^2$

You can't use this formula directly, because you're given the diameter, not the radius.

The radius of a circle is half of the diameter, so we divide the diameter by $2$ $2$ .

$2.1 \div 2 = 1.05$ $2.1 -: 2 = 1.05$

Since the radius is $1.05$ $1.05$ meters, the area is

$π \cdot {(1.05)}^{2}$ $pi * (1.05)^2$ square meters.

$1.05 \times 1.05 = 1.1025$ $1.05 xx 1.05 = 1.1025$ square meters.

The area of the circle is $1.1025 π$ $1.1025 pi$ square meters.