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Standard VIII

Mathematics

Circle Mensuration

O is the cent...

Question

$O$ is the center of the circle, and the diameter is $12$ . What is length the arc $A B$ ?

3 π

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6 π

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9 π

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18 π

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Solution

The correct option is C $3 π$
Given: Diameter of the circle $(d) = 12$ cm
$∴$ radius of the circle $= \frac{12}{2} = 6$ cm
Length of the arc AB $= \frac{2 π r}{4}$
$= \frac{6 π}{2} = 3 π$

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O is the center of the circle, and the diameter is 12. What is length the arc AB?

The correct option is C 3πGiven: Diameter of the circle (d)=12cm∴ radius of the circle =122=6 cmLength of the arc AB=2πr4=6π2=3π

$O$ is the center of the circle, and the diameter is $12$ . What is length the arc $A B$ ?

The correct option is C $3 π$
Given: Diameter of the circle $(d) = 12$ cm
$∴$ radius of the circle $= \frac{12}{2} = 6$ cm
Length of the arc AB $= \frac{2 π r}{4}$
$= \frac{6 π}{2} = 3 π$