Question

Solve questions no 18​

Answer 1

Answer:

⇒ Radius of semi-circle (r)=

4

14−6

=

4

8

=2cm

⇒ Side of a small square 2r=2×2=4cm

⇒ Area of big square =(side)

2

=(14)

2

=196cm

2

⇒ Area of a small square =(side)

2

=(4)

2

=16cm

2

⇒ Area of 4 semicircle =4×

2

πr

2

=4×

2

3.14×(2)

2

=25.12cm

2

∴ Area of shaded region = Area of a big square - Area of a small square - Area of a 4 semicircle.

∴ Area of shaded region=(196−16−25.12)cm

2

=154.88cm

2

Answer 2

Answer:

1. find the area of Rectangle
2. find the area of 4 semi circles
3. subtract area of Rectangle and area of 4 semi circles

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