Question

30. In the given figure, ABCD is a rectangle of dimensions 21 cm  14 cm. A semicircle is drawn with BC as
diameter. Find the area and the perimeter of the shaded region in the figure.
Step by step

Answer 1

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Answer 2

Answer:

perimeter=78cm and area=217cm^2

Step-by-step explanation:

Area of shaded region = Area of rectangle - Area of semi-circle

= (21 × 14) – ½ × π × 7 × 7

= 294 – 77

= 217 cm2

Perimeter of shaded region = 21 + 14 + 21 + π × 7

= 56 + 22

= 78 cm