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Q:

# How do you measure diameter?

A:

If the radius of the circle is known, the diameter formula is diameter=2R, where R equals the circle's radius. If the circumference of the circle is known, the diameter is found using diameter=C/Pi, where C is the circumference and pi is approximately 3.142.

Know More

If the area of a circle is known, the diameter is the square root of 4A/Pi, where A is the area of the circle and Pi is approximately 3.142. The diameter of the circle is the length of the line through the center of the circle that touches two of the points on its edge The center of the circle is the midpoint of the diameter. A diameter may also be referred to as a chord, which is any line that joins two points on a circle. The diameter is the longest chord on any circle.

## Related Questions

• A:

The equation for the area of a circle is pi times the square of the radius or A = πr2. Calculating the area of a sector involves figuring out what fraction of the circle's area the sector covers.

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• A:

A circle that measures 10 feet across has a radius of 5 feet. The diameter is the distance from one side of the circle to the other, passing through the circle's center. The diameter equals two times the radius, so the radius equals the diameter divided by two.

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• A:

The turning radius of a vehicle is the diameter of the narrowest circle it is capable of maneuvering and is dependent on many design factors, including wheelbase length, axle width, and the steering mechanism design. Midsized cars, depending on brand, normally have a turning radius of 34 to 38 feet.