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The length' of an arc of a circle is 4 c...

The length' of an arc of a circle is `4 cm`. What is the length of an arc of the same central angle in a circle of double the radius?

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  7. Calculate the-area of the green colored part of this picture:

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  8. Centered at each corner of a regular hexagon, a part of a circle is dr...

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  9. The picture below shows two circles, each passing through the center o...

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  10. The figure shows three circles drawn with their centers on each vertex...

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  11. The picture shóws a rectangular sheet of metal with two semicircles (h...

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  12. A garden is in the shape shown below, with two semicircles on the shor...

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  13. The pendulum in a clock is 14 ~cm long. It moves through 40^(circ) mak...

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  14. The minute hand of a clock is 20 ~cm long. What is the area it sweeps ...

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  15. In the picture below, C is the centre of the circle. Find the area of ...

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  16. In the picture A C B is an arc of the circle with cẹntre O and radius ...

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  17. In the picture below, AB and CD are ärcs of circles centred at 0 . If ...

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  18. Find the relation between the length of an arc and the area of the sec...

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  19. The figure shown below is formed by a rectangle with semicircles on ea...

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