Question

✨✔️ In Fig. AB and CD are two diameters of a circle (with centre O) perpendicular to each other and OD is the diameter of the smaller circle. If OA = 7cm, Find the area of shaded region.

Answer 1

Area of sector OBC= pie r^2/4

OB = OC = OA = OD= r = 7

area of sector = 22/7 × 7 × 7 × 1/4

= 154/4 = 38.5

Area of right angled OBC = 1/2 × r × r = 1/2 × 7 × 7

= 49/2 = 24.5

Now area of one shaded region = 38.5 -24.5 = 14

Same way area of shaded region under CA = 14

area of circle with OD as diameter = pie r^2

= 22/7 × 7 /2× 7/2

= 154/4 = 38.5


So area of whole shaded = 14 + 14 +38.5 = 28+ 38.5 = 66.5 cm^2

Answer 2

ANSWER


AREA OF SHADED REGION
66.5 CM^2


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