Question

Sudhanshu divideds a circular disc of radius 7cm in two equal parts. What is the perimeter of each semicircular shape disc?(Use = [tex\dfrac{22}{7}[/tex]
$\pi$
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Answer 1

Step-by-step explanation:

pie×r +2r is formula for semicircular disc

22 + 14

=36

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Answer 2

Given:

Sudhanshu divideds a circular disc of radius 7cm in two equal parts.

To find:

What is the perimeter of each semicircular shape disc?

Solution:

Given that radius (r) = 7 cm.

We know that the circumference of circle = 2πr

So, the circumference of the semicircle

$\frac{1}{2 } \times 2\pi \gamma = \pi \gamma \\ \frac{22}{7} \times 7cm = 22cm \\ So ,\: the \: diameter \: of \: circle = 2r = \\ 2 \times 7cm \\ = 14cm \\ Thus, perimeter \: of \: each \: \\ semicircular \\ disc = 22 cm + 14 cm = 36 cm.$