Question

A circumference of a semi circle whose diameter is 7 is

Answer 1

Answer:

36 cm

Step-by-step explanation:

circle circumference=2*pi*r

semi circle circumference=1/2*2*pi*r +2r

                                          =pi*r+2r

                                          =22+2 (7)

                                          =36 cm

Answer 2

Answer:

circumference of a semi circle=

$2\pi \times radius \: \div 2$

radius = diameter÷2

=7÷2

=3.5

2×22/7×3.5÷2

=11 . answer .

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