Question

Find the perimeter of the adjoining figure, which is a semicircle including its diameter.
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Answer 1

Answer:

Perimeter of semi-circle = half of the perimeter of the circle

Perimeter = 2 × Pie × R / 2

Perimeter = Pie × R

Now let's find radius:

Radius = Diameter/2

Radius = 10/2

Radius = 5

Now let's put the value in formula

Perimeter = Pie × R

Perimeter = 22/7 × 5

Perimeter = 110/7

Perimeter = 15.7142857142 approx.

Hope it helps!!

Answer 2

Answer:

Perimeter of given figure

$= \frac{1}{2} \times 2\pi \: r \: + 2r \\ \\ \ = {frac {22}{7} \times 5 + 10 \\ = \frac{110}{7} + 10\\ = 25.7cm \: (approx)$