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The radius of a circle equals the diameter divided by two. 30/2 is 15, so your answer is 15 cm.

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Q: If the diameter of a circle 30 cm what is its radius?
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Related questions

What is the diameter of a circle if its radius is 15cm?

Diameter = Radius*2 = 30 cm.


What is the radius of a circle with a 30 cm diameter?

15 cm


What is the radius of a circle with a diameter of 15 cm?

The diameter of a circle is twice its radius. Thus the radius of a circle is half its diameter. → a circle with a diameter of 15 cm has a radius of 15/2 cm = 7.5 cm


The diameter of a circle is 12 cm what is its radius?

If the diameter is 12 cm the radius is 6 cm.


What is a circle's diameter if the radius is 7 cm?

The diameter of a circle is double the radius. So a circle with a radius of 7 cm has a diameter of 14 cm.


What is the radius of a circle with a 6.2 cm diameter?

The radius (radii) of a circle is 1/2 of the diameter. The radius of a circle with a 6.2 cm diameter is 3.1 cm.


What is the radius of a 2 cm circle?

The radius of a circle is half the diameter, so if the circle has a diameter of 2 cm, the radius would be 1 cm.


What is the radius of a circle if its diameter is cm?

The radius of a circle is half of its diameter


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

The radius of a circle is half of its diameter.


What is the diameter of a circle with a radius of 12cm?

the diameter of a circle is double the radius so if the radius is 12 cm then the diameter is 24 cm


What is the diameter of a circle with the radius of 5 cm?

10 cm; the diameter of a circle is twice its radius.


What is the radius of a circle that has a 10 cm diameter?

The radius of a circle is half the length of its diameter. Therefore, if the diameter of the circle is 10 cm, the radius would be half of that, which is 5 cm. The formula to find the radius of a circle is r = d/2, where r is the radius and d is the diameter.