Question

solve question 10 and 11

Answer 1

11. Radius of semicircles = 4/2=2 cm side of large square=14 cm
side of small square=4cm
area of large square=(side)^2=(14)^2=196 cm ^2
Area of small square=(side)^2=(4)^2=16 cm ^2 Area of semi circle=1/2πr2=1/2×3.14×2×2=6.28 cm2 Area of shaded region= Area of large square − Area of small square − 4 ×Area of semi circle =
196−16−(4×6.28)
=180−25.12
=154.88 cm2    ANS.