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In Figure, from a rectangular region A B...

In Figure, from a rectangular region `A B C D` with `A B=20\ c m` , a right triangle `A E D` with `A E=9\ c m` and `D E=12 c m` , is cut off. On the other end, taking `B C` as diameter, a semicircle is added on outside the region. Find the area of the shaded region. `(U s e\ \ pi=22//7)`

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In Fig. 15.93, A B C D is a rectangle with A B=14\ c m and B C=7\ c m . Taking D C ,\ B C and A D as diameters, three semi-circles are drawn as shown in the figure. Find the area of the shaded region.

In Figure, O A B C is a square of side 7 cm. If O A P C is a quadrant of a circle with centre O , then find the area of the shaded region. (U s e\ \ pi=22//7)

In Figure, O E=20\ c m . In sector O B F T , square O E F G is inscribed. Find the area of the shaded region.

In Fig. 12.31, a square OABC is inscribed in a quadrant OPBQ. If O A=20 c m , find the area of the shaded region. ( U s e pi=3. 14 )

In Figure, A B and C D are two diameters of a circle perpendicular to each other and O D is the diameter of the smaller circle. If O A=7\ c m , find the area of the shaded region.

In Fig. , A B C D is a rectangle, having A B=20\ c m and B C=14\ c m . Two sectors of 180o have been cut off. Calculate: (i) the area of the shaded region. (ii) the length of the boundary of the shaded region.

In Fig. 15.98, A B C is a right angled triangle in which /_A=90o , A B=21\ c m and A C=28\ c m . Semi-circles are described on A B ,\ B C and A C as diameters. Find the area of the shaded region. (FIGURE)

In Figure, A B C D is a trapezium with A B || D C and /_B C D=60^@ . If B F E C is a sector of a circle with centre C and A B=B C=7\ c m and D E=4\ c m , then find the area of the shaded region (U s e\ \ pi=(22)/7\ a n d\ sqrt(3)=1. 732) .

A sheet of paper is in the form of a rectangle A B C D in which A B=40 c m and A D=28 c m . A semi-circular portion with B C as diameter is cut off. Find the area of the remaining paper.

In Figure, A B C D is a trapezium of area 24. 5\ c m^2 . In it, A D || B C , /_D A B=90^@ , A D=10\ c m and B C=4\ c m . If A B E is a quadrant of a circle, find the area of the shaded region. (T a k e\ pi=22//7) .

RD SHARMA ENGLISH-AREAS RELATED TO CIRCLES-All Questions
  1. In the given figure, three semicircles are drawn of diameter 10 cm, 7 ...

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  2. In Figure, A B C D is a trapezium of area 24. 5\ c m^2 . In it, A D ...

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  3. In Figure, from a rectangular region A B C D with A B=20\ c m , a righ...

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  4. What is the ratio of the areas of a circle and an equilateral trian...

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  5. The circumference of two circles are in the ratio 2\ :3 . Find the ...

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  6. Write the area of the sector of a circle whose radius is r and l...

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  7. What is the length (in terms of pi ) of the arc that subtends an angle...

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  8. What is the angle subtended at the centre of a circle of radius 6 c...

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  9. What is the area of a sector of a circle of radius 5 cm formed by a...

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  10. In a circle of radius 10 cm, an arc subtends an angle of 108o at ...

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  11. If a square is inscribed in a circle, find the ratio of the areas of ...

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  12. Write the formula for the area of a sector of angle theta (in de...

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  13. Write the formula for the area of a segment in a circle of radius r...

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  14. If the adjoining figure is a sector of a circle of radius 10.5 cm, ...

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  15. If the diameter of a semi-circular protractor is 14 cm, then find i...

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  16. An arc subtends an angle of 90^@ at the centre of the circle of radi...

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  17. What is the area of the largest triangle that can be inscribed in a se...

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  18. If the circumference and the area of a circle are numerically equal,...

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  19. If the difference between the circumference and radius of a circle i...

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  20. A wire can be bent in the form of a circle of radius 56 cm. If it i...

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