Question

xiv.
If diameter of a circle is 7 cm, then perimeter of the semicircle is​

Answer 1

Answer:

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so here we go

Step-by-step explanation:

now diameter is 7 cm

so radius is 3.5 cm

now perimeter of semicircle=(2pi r/2)+d

so (2×22/7×3.5/2)+7

ie (2×22×0.5/2)+7

=(22×0.5)+7

=11+7

=18 cm

hence perimeter ie circumference of semicircle is 18 cm

Answer 2

Answer:

18

Step-by-step explanation:

if d=7 ,so r =3

perimeter of semi circle=22/7×3.5 + 7 =18