Question

Question :-
Radius of a semicircle is 1.4 cm. it's perimeter will be .

step by step answering​

Answer 1

Step-by-step explanation:

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Perimeter of semicircle = pie r

So,

Perimeter = 22/7 * 14 = 22*2 = 44cm...

SO when circle is cut into half than diameter is also included

Now,

Final perimeter of semicircle = 28 + 44 = 72cm

Answer 2

Answer:

Perimeter of the semicircle is obtained using the formula r(π+2).

Radius r=14 cm

So, perimeter =14(π+2)..... where π=722 

=2(22+14)=44+28=72 cm

Hence, the answer is 72 cm.