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70/2 = 35 (radius of circle)
area of the shaded part = pi x 35 x 35 – [(1/4 x pi x 35 x 35 – 1/2 x 35 x 35) x 4] = 2450

perimeter of the shaded part = pi x 70 = 70pi

Ans : area of the shaded part = 2450 sq cm; perimeter of the shaded part = 70pi cm.

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Hope this answers your question.

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This is a Area question.

Perimeter

2 x π x 35 = 70π 

Area

  Quadrant Triangle Half Eyeball
Area 306.25π 612.5 306.25π – 612.5

π x 35 x 35 x 1/4 = 306.25π

1/2 x 35 x 35 = 612.5

306.25π x 4 = 1225π

612.5 x 4 = 2450

Area  = (1225π – 2450)

 

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