Best Answer

14 cm. In a circle, diameter is always twice the radius.

Q: What is the diameter of a circle whose radius is 7 cm?

Write your answer...

Submit

Still have questions?

Continue Learning about Algebra

That depends what you mean with "a 20 cm. circle". If 20 cm. is the radius, you already have the answer. If 20 cm. is the diameter, the radius is half the diameter. (10cm)

Radius = diameter/2 = 5 cm

A circle with a radius of 81 cm has a circumference of 508.94 cm

About 7 cm.

148

Related questions

Diameter = Radius * 2 In this case, radius = 8 cm so diameter = 16 cm

It is 14 cm.

Diameter is twice the radius, so 15 cm.

A circle with a radius of 4.5 cm has a circumference of 28.27 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

10 cm

If the diameter is 12 cm the radius is 6 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.

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.

The radius of a circle is half of its diameter

The radius of a circle is half of its diameter.

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