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In a circle of radius \( 6 \mathrm{~cm} \), a chord of length \( 10 \mathrm{~cm} \) makes an angle of \( 110^{\circ} \) at the centre of the circle. Find the area of the circle.
Given:
Radius of the circle $r=6 \mathrm{~cm}$.
Length of the arc $l=10 \mathrm{~cm}$.
Angle subtended at the centre $=110^{\circ}$.
To do:
We have to find the area of the circle.
Solution:
Let $OA$ and $OB$ are the radii of the circle and $AB$ the chord.
We know that,
Area of a circle of radius $r$ is $\pi r^2$.
Therefore,
Area of the circle $=3.14 \times 6 \times 6\ cm$
$=113.04\ cm^2$
The area of the circle is $113.04\ cm^2$.
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