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The diameter of a circle is twice the radius.

Q: If a circles radius is 2.5cm what is the diameter?

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Yes, the radius is half the diameter. (Eg, if the DIAMETER is 6, the RADIUS would be 3).

It is: 2 to 1

circumference = 2*pi*radius or pi*diameter

Since radius is half of a diameter, therefore 12 x 2 = 24

to calculate circumference you find a circles radius or diameter. you do diameter times pi or radius times 2 times pi. the you have circumference!

Related questions

Yes, the radius is half the diameter. (Eg, if the DIAMETER is 6, the RADIUS would be 3).

Since with circles the radius is half the diameter, the diameter would be 6 cm.

The ratio of radius to diameter for any circle is 1/2

The radius will be half the diameter of 8 inches which is 4 inches

Divide the diameter by 2 to get the radius then square the radius, and finally multiply by pie (3.14)

It is: 2 to 1

diameter ------------- Diameter. The R (radius) of a circle multiplied by two equals the diameter.

Radius, Diameter, Arc,Seicircle, Circumference and area.

circumference = 2*pi*radius or pi*diameter

Since radius is half of a diameter, therefore 12 x 2 = 24

to find the circumfrence you do pi times diameter ( 50* approx 3.14) which gives you 157cm

to calculate circumference you find a circles radius or diameter. you do diameter times pi or radius times 2 times pi. the you have circumference!