Question

circumference of semicircle with radius 2.8

Answer 1

Answer:

14.4

Step-by-step explanation:

Given :-

Redius = 2.8cm

we have to find circumference

circumference = πr+2r

$\frac{22}{7} \times 2.8 + 2 \times 2.8 \\ 8.8 + 5.6 \\ 14.4cm$

Answer 2

Answer:

Hence, value of circumference of semi circle will be 14.4 units

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 = 2.8 units

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.

$C = \Pi r +2r \\= \frac{22}{7}\times 2.8 +2\times 2.8\\=>(22 \times 0.4) + 5.6\\=>8.8+5.6 = 14.4\:unit$