1.

3. The radius of a semi-circle shaped plot is 21meter. Find its area and perimeter.​

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ANSWER:

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Step-by-step EXPLANATION:

Area=(1/2).pi.r^2  

= (1/2)×22/7×21×21 sq.m

=11×3×21 sq.m.  

=693 sq.m. , Answer.

Perimeter =pi.r+2r

= r(pi +2)

=21(22/7+2)

=21×36/7

=3×36

=108 m. , Answer

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