Question

a table top is semi-circular in shape with diameter 21 cm. find the perimeter and area of the table top.​

Answer 1

Answer:

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Answer 2

The perimeter and area of the table top are 54 cm and 173.25 sq.cm. respectively.

Step-by-step explanation:

Formula of perimeter of semicircle =$\frac{\pi}{2}d+d$

Diameter of semi-circular shape table top = 21 cm

Radius =$\frac{21}{2}=10.5 cm$

So, Perimeter of semi-circular shape table top = $\frac{\frac{22}{7}}{2}(21)+(21)=54 cm$

Area of semicircle = $\frac{\pi}{2}r^2$

Area of semicircle = $\frac{\frac{22}{7}}{2}(10.5)^2$

Area of semicircle = $173.25 cm^2$

Hence the perimeter and area of the table top are 54 cm and 173.25 sq.cm. respectively.

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