Question

What is the circumference of a semicircle if its radius is 3.5 cm.

Answer 1

CIRCUMFERENCE OF CIRCLE = 2πr

So, CIRCUMFERENCE OF SEMICIRCLE = 1/2 *2πr

So. Circumference of semicircle = πr

= 22/7 * 3.5

= 22/7 * 35/10

= 22/2

= 11 Cm...

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Answer 2

Answer:

Hence, value of circumference of semi circle will be 18 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 = 3.5 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.

$C = \Pi r +2r \\= \frac{22}{7}\times 3.5 +2\times 3.5\\=>(22 \times 0.5) + 7\\=>11+7 = 18\:cm$