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36 inches.

The radius is the distance from the centre to the outside or circumference and trhe diameter is the distance across passing through the centre. Therfore the diameter is twice the distance of the radius.

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Q: If the radius of a circle is 18 inches what is the diameter?
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Related questions

What is the radius of 18 inches?

If the diameter of a circle is 18 inches then its radius is 18/2 = 9 inches


If the radius of a circle is 9 inches what is the diameter?

18 inches


What is the circumference and diameterof a circle with a radius of 9 inches?

A circle with a radius of 9 inches has a circumference of 56.55 inches and a diameter of 18 inches.


If the raidius of a circle is 18 inches what is the diameter?

Diameter = twice the radius = 2 x 18 = 36 inches.


What is the circumference of a circle if the diameter is 36 inches?

A circle with a radius of 18 inches has a circumference of 113.097 inches.


If the radius of a circle is 15 inches what is the diameter?

R=D/2. If the diameter of a circle is 18 inches, the radius is 9 inches. Radius = 1/2 diameter or 9"


If The exact area of a circle is 81pi square inches what are the radius and diameter of the circle explain?

The radius is 9 inches because area of circle is pi*9 squared = 81pi square inches and the diameter is twice the radius which is 2*9 = 18 inches


If the diameter of a circle is 36 incheswhat is the radius?

The radius is 18 inches (r = d/2).


What is the diameter of a circle with a 9 radius?

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).


How many square inches in a 18 inch circle?

All depends what you mean by 18 inches, is that the circumference, the diameter or the radius


If the diameter of a circle is 36 what is the radius?

Radius is half the diameter. 18 is the answer.


What is the circumference of a circle with a radius of 9 inches?

pi x diameter diameter=radius2 9x2=18 18xpi=56.548