Question

Find the area of the shaded region in each of the following figures.
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Answer 1

SolutioN :-

Diameter = 21 cm

Radius = 21/2 cm

★ Area of semicircles = 4 × πr

→ 4 × 22/7 × 21

→ 4 × 22 × 3

→ 264 cm²

Side of square = 21 cm

★ Area of square = a²

→ 21 × 21

→ 441 cm²

Area of figure = Area of semicircles + Area of square

Area of figure = 264 + 441

Area of figure = 705 cm²

Answer 2

$\large{\underbrace{\sf{\red{Required \:answer:}}}}$

⟶Diameter=21 cm

⟶Radius = 21/2cm

$\huge{\underline{\sf{\pink{Area}}}}$ $\huge{\underline{\sf{\pink{of}}}}$ $\huge{\underline{\sf{\pink{Semicircle}}}}$

=4×πr

⟶4×22/7×21

⟶4×22×3

$264 {cm}^{2}$

⟶Side of square=21 cm

⟶Area of square=

${a}^{2}$

⟶21×21

$441 {cm}^{2}$

Area of figure=Area of square+Area of semicircle

Area of figure= 264+441

$area \: of \: figure \: = 705 {cm}^{2}$