How to Find the Diameter from the Radius

Finding the Diameter from the Radius

The diameter of a circle is twice the radius.

How to Find the Diameter from the Radius

Finding the diameter from the radius is easy.

Question

What is the radius of the circle, with radius 5 cm, below?

Step-by-Step:

1

Multiply the radius, 5cm, by 2.

5 × 2 = 10 cm

Answer:

The diameter of the circle is 10 cm.

Slider

The slider below shows another real example of how to find the diameter of a circle from the radius.

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See Also

What is the diameter? What is a circle? What is the radius? Find the diameter from the radius of a circle ( interactive widget)