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Perimeter of a Triangle

What is the p...

Question

What is the perimeter of a semi-circle with a diameter of $4$ cm? (Use $π = 3.14$ )

11.28

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12.28

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10.28

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9.28

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Solution

The correct option is D $10.28$ cm
Diameter $= 4$ cm
Perimeter of the semicircle $=$ $\frac{π d}{2} + d$
$=$ $\frac{π \times 4}{2} + 4$
$=$ $2 \times 3.14 + 4$
$= 10.28$ cm

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