Question

the radius of a semicircle is 7 find its sum circumference​

Answer 1

Answer:

21.98 approximately

Step-by-step explanation:

circumference of semi circle = r*pi

                                                = 7*3.14

                                                = 21.98                  

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Answer 2

Answer:

Hence, value of circumference of semi circle will be 36 cm

Step-by-step explanation:

In context to question asked,

We have to determine the circumference of semi circle.

As per data given in the question,

We have,

Radius of semi circle = 7 cm

As we know that,

Circumference of semi circle is equal to half of circumference of circle plus value of diameter.

So, we have,

Formula for finding the circumference of semi circle as,

$Circumference \:C = (\Pi r + 2r), \\where \:'r' \:is \:the\: radius.$

So, for determining the value of circumference of semi circle we will put the value of radius in above formula.

Thus we will get.

$C = \Pi r +2r \\= \frac{22}{7}\times 7 +2\times 7\\=>(22 \times 1) + 14\\=>22+14 = 36\:cm$