Question

Find the perimeter of a semicircle if the radius is 15 cm and also find the diameter of the semicircle​

Answer 1

diameter of semicircle? ---> 30cm

perimeter- pi*r ----> 3.14159265 x 15 ---->47.12 cm

Answer 2

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Given that,

radius of semi-circle = 15 cm

so, perimeter of the semi-circle =

$\pi r = 2 \times 22 \div 7 \times 15 = 47.4cm$

Diameter of the semi-circle=

$2r = 2 \times 15 = 30cm$

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