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Find the angle subtended at the centre o...

Find the angle subtended at the centre of a circle of radius `' a '` by an arc of length `(api//4)` .

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RD SHARMA-AREAS RELATED TO CIRCLES-All Questions
  1. An arc of length 20pi cm subtends an angle of 144o at the centre...

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  2. An arc of length 15 cm subtends an angle of 45o at the centre of a ...

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  3. Find the angle subtended at the centre of a circle of radius ' a ' ...

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  4. Find the area of the sector of a circle with radius 4 cm and of ang...

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  5. A sector of a circle of radius 8 cm contains an angle of 135o . Fin...

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  6. The area of a sector of a circle 2 cm is pi\ c m^2 . Find the angle co...

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  7. The area of a sector of a circle 5 cm is 5\ pi\ c m^2 . Find the angle...

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  8. A B is a chord of a circle with centre O and radius 4 cm. A B is...

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  9. In a circle of radius 35 cm, an arc subtends an angle of 72o at ...

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  10. The perimeter of a sector a circle of radius 5.7 m is 27.2 m. Find ...

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  11. The perimeter of a certain sector of a circle of radius 5.7 m is 27....

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  12. A sector is cut-off from a circle of radius 21 cm. The angle of the...

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  13. The minute hand of a clock is sqrt(21) cm long. Find the area descr...

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  14. In a circle of radius 6 cm, a chord of length 10 cm makes an angle ...

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  15. In a circle of radius 6 cm, a chord of length 10 cm makes an angle ...

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  16. Fig. 15.17, shows a sector of a circle, centre O , containing an an...

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  17. Find the area of the segment of a circle, given that the angle of t...

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  18. A chord A B of a circle of radius 15 cm makes an angle of 60o at ...

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  19. In a circle of radius 21 cm, an arc subtends an angle of 60o at ...

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  20. A B is a chord of a circle with centre O and radius 4 cm. A B is...

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