Q: What is the radius for 18 feet diameter?

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If the radius is 18 feet - then the diameter is 36 feet. The circumference measurement is irrelevant !

If the radius is 8 feet then the diameter will be 16 feet.

Diameter = 2 * radius So in this case, 40 feet.

The radius would be 4 feet I know this because the diameter is always 2x the size of the radius.

Radius is half the diameter. 36/2=18

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If the radius is 18 feet - then the diameter is 36 feet. The circumference measurement is irrelevant !

Diameter is twice the radius, so 18 feet.

9'

Radius is half the diameter, so a radius of 50 feet the diameter will be 100 feet.

If the radius is 8 feet then the diameter will be 16 feet.

The area of a circle is equal to πr2 where π (pi) is equal to approximately 3.142 and r represents the radius of the circle. Because the question gives you the diameter and not the radius you have to use the measurement of the diameter to calculate the radius. Remember that the radius is equal to half the diameter. So if the diameter is equal to 18 feet, then the radius of this particular circle is equal to 9 feet. Plugging this into our equation for area we get: area = π(92) area = 3.142(81) area = about 254.5 ft2 (don't forget that the answer is in squared feet not just feet)

4 feet. The radius is half the diameter.

Diameter is 16. The radius is half its diameter

The diameter of a circle is twice the radius. A circle with a radius of 9 would have a diameter of 18. (9*2=18).

Radius is half the diameter. 18 is the answer.

Diameter = 2 * radius So in this case, 40 feet.

There are three feet in one yard, so a diameter of two yards is six feet. The radius is half the diameter, so the radius is three feet.