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To find the area of a cirle you multiple pi (3.14) by the radius squared, so you would have to find 3.14 times 4, which is 15.7.

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16y ago
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14y ago

12.566 units2

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Anonymous

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4y ago

15.7

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Q: What is the area of a circle with radius 2?
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Formula and result of area of circle?

The formula for the area of a circle is: Area = (pi) x (Radius)2 . When you know the radius of the circle and you use it to calculate the area of the circle, the result will be equal to (pi) x (Radius)2 .


What is area of a circle with radius of 2 cm?

A circle with a radius of 2 cm has an area of 12.57 square cm.


Why do you use the radius in the formula of finding the area of a circle?

Area of circle = pi*(radius)2


What is the radius of a circle if the area is 4?

The radius of the circle is 2 units. * * * * * If the area is 4 units, the radius is 1.128 units


How do you fine the area of a circle given the radius of the circle?

Area of a circle = (pi) x (radius)2 (pi) = about 3.1416 or about 22/7 . (It can never be written down exactly.) (radius)2 = (radius) x (radius)


What is the area in square cm of the circle if the radius is 12 cm?

Area of ANY circle is (pi) x (radius)2 .


What do you multiply the radius by?

circumference of a circle = 2*pi*radius area of a circle = pi*radius squared


What is the formula for a circle radius r?

Area of a circle = pi*radius2 Circumference of a circle = 2*pi*radius or diameter*pi Diameter of a circle = 2*radius


What is the diameter of a circle if the radius is 2?

A circle with a radius of 2 units has an area of 12.57 square units.


What is the area of a circle if the radius is 19mm?

The area is (pi) times (the radius)2 , just as it is in any other circle.


What is the radius of a circle with an area of 12.57cm2?

The radius is 2 cm


What is the surface area of a circle with a radius of 2?

area of a circle = pi * radius ^2. Ans = 3.14159 * 2^2 = 12.57 square units, given the radius being 2 units.