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The perimeter of the shaded region in the given figure is :
The perimeter of a quadrant of a circle of radius 7 cm, is :
A chord of a circle of radius 14 cm subtends an angle of 90° at the centre. Find perimeter of shaded region.
A farmer has put up a decorative windmill in his farm in which there are eight blades of equal width and equally placed in a circular arrangement. A circular wire goes through them. The diagram shows two blades OAB and OPQ in a quarter circle with centre O. ∠AOB = ∠POQ = 30°, OA = 28 cm, OC = 21 cm. O is the centre of both the circles.
OAB is sector of a circle with centre O and radius 7 cm. If length of arc AB = 22/3 cm, then ∠AOB is equal to
AB and CD are diameters of a circle with centre O and radius 7 cm. If ∠BOD = 30°, then find the area and perimeter of the shaded region.
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