Question

find the area of the shaded part in the following figures.(π=3.14)​

Answer 1

$\dag \underline{ \boxed{ \sf{ \purple{Given}}}} \dag$

★ Side = 10cm

$\dag \underline{ \boxed{ \sf{ \pink{To \: Find}}}} \dag$

★ Area of the shaded part = Area of 4 quadrant circles of radius 10/2 cm

$\dag \underline{ \boxed{ \sf{ \red{solution}}}} \dag$

$\sf= 4 × \frac{1}{4} × πr²$

$\sf = 3.14 × \sf\frac{10}{2} × \frac{10}{2} cm²$

$\sf= \frac{314}{4} \: cm²$

$\sf = 78.5 \: cm²$

$\small\fbox\red{ \sf \: Area of the shaded part = 78.5 cm²}$

★ Area of the unshaded part = Area of the square – Area of shaded part

$\sf= a² \: – \: 78.5 \: cm² = (10 × 10) \: – \: 78.5 \: cm²$

$\sf= 100 \: – \: 78.5 \: cm²$

$\sf= 21.5 \: cm²$

★ Area of the unshaded part = 21.5 cm2 ( approximately )