Question

in figure find the perimeter of shaded region where adc, aeb and bfc are semicircles on diameter a c a b and b c respectively

Answer 1

hye
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first let us find area of abe {diameter =2.8 so radius is 1.4}
= 22/7×1.4 *1.4
= 6.16cm

let us find the area of bcf [diametr is 1.4 so r =0.7]
=22/7*0.7*0.7
= 1.54 cm

let us find the area of adc[d =4.2 ,r = 2.1]
=22/7 ×2.1×2.1
= 13.86 cm

area of shaded region = area of adc-aeb + bcf
                                             = 13.86-6.16+1.54
                                              = 9.24 cm
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hope it helps
>>>>>>>>>>>>>>>>>>
omkara2

Answer 2

Answer :- Perimeter of the shaded region is 13. 2 cm.