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Circumference : 94.2 meters Area : 706.5 square meters

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Q: Find the circumference and area of the circle if the diameter is 30 meters?

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The circumference of a circle is 15\piπ m. Find its radius, in meters. The Answer Should Be 7.5

Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 21.67698931 or 21.7 meters to the nearest tenth

Diameter: 157/3.14 = 50 meters

diameter*pi = circumference

Diameter = circumference/pi

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Divide the circumference by Pi (about 3.1416). The result is the diameter:255 / 3.1416 = about 81.17 meters diameter.

The circumference of a circle is 15\piπ m. Find its radius, in meters. The Answer Should Be 7.5

Circumference of a circle = 2*pi*radius or pi*diameter Circumference = 21.67698931 or 21.7 meters to the nearest tenth

Diameter: 157/3.14 = 50 meters

Diameter of a circle = circumference/pi

Divide the known circumference by pi to find the diameter of the circle.

circumference/pi = diameter

Diameter = circumference/pi

diameter*pi = circumference

Divide the circumference by Pi to find the diameter.

The process you would use to find the circumference of a circle completely depends on what information you already have about the circle. For example, you might be given the circle's area, or its radius, or its diameter, or the length of one radian of arc along the circumference, and each of those would require a different method to find the circumference. The easiest example is the one where you know the circle's diameter. In that case, simply multiply the diameter by (pi) to get the circumference. The next easiest case is the one where you have the circle's radius ... let's say the radius is 1.5 meters. Knowing that the radius is half of the diameter, you first double the radius, and find that the diameter 3.0 meters. Then you get the circumference just as you did in the first example ... multiply the diameter by (pi). With a radius of 1.5 meter, you would find that the circumference is about 9.425 meters. (rounded)

To get the circumference of a circle first you have to find the diameter of the circle and multiply the diameter by Pi (3.14 in short). so it is the diameter * Pi.

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