Question

Find the circumference and area of a semicircle whose radius is : 7.7cm

Answer 1

area =186.34cm^2. circumference=48.4cm by this solution

Answer 2

Answer:

Hence, value of circumference of semi circle will be 39.6 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 = 7.7 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.

$C = \Pi r +2r \\= \frac{22}{7}\times 7.7 +2\times 7.7\\=>(22 \times 1.1) + 15.4\\=>24.2+15.4 = 39.6\:cm$