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Question

If diameter of a circle is 18 cm, then the radius is ____ cm.


A

Half of 18

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B

Twice of 18

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C

18×18 cm

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D

18 + 18

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Solution

The correct option is A

Half of 18


We know that the radius of the circle is half of the diameter.
Therefore, if diameter is 18, then radius is half of 18, which is 9 cm.


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