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An umbrella has 8 ribs which are equally...

An umbrella has 8 ribs which are equally spaced (see Fig.12.13).

Assuming unbrella to be a flat circle of radius 45 cm.Find the area between the two consecutive ribs of the umbrella.

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R G PUBLICATION-AREAS RELATED TO CIRCLES-EXERCISE
  1. A brooch is made with silver wire in the form of a circle with diamete...

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  2. A brooch is made with silver wire in the form of a circle with diamete...

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  3. An umbrella has 8 ribs which are equally spaced (see Fig.12.13). Assu...

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  4. A car has two wipes which do not overlap.Each wiper has a blade of len...

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  5. To warn ships for underwater rocks,a lighthouse spreads a red coloures...

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  6. A round table cover has six equal designs as shown in Fig.12.14. If th...

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  7. Tick the correct answer in the following :Area of a sector of angle p(...

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  8. Find the area of the shaded region in Fig.12.19,If PQ=24cm,PR=7 cm and...

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  9. Find the area of the shaded region in Fig12.20,if radius of the two co...

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  10. Find the area of the shaded region in Fig.12.21,If ABCD is a square of...

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  11. Find the area of the shaded region in Fig.12.21,,where a circular arc ...

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  12. From each cornor of a square of side 4 cm a quadrant of a circle of ra...

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  13. In Fig.12.25,ABCD is a square of side 14 cm.with centres A,B,C and D,f...

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  14. In Fig12.26 depicts a racing track whose left and right ends are semic...

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  15. The area of an equilateral triangle ABC is 17320.5cm^2.With each verte...

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  16. On a square handkerchief,nine circular designs each of radius 7 cm are...

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  17. If Fig.12.30,OACB is a quadrant of a circle with centre O and radius 3...

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  18. If Fig.12.30,OACB is a quadrant of a circle with centre O and radius 3...

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  19. In Fig.12.31,a square OABC is inscribed in a quadrant OPBQ.If OA=20cm,...

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  20. AB and CD are respectively arcs of two concentric circles of radii 21 ...

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