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The perimeter of a circle has the formula 2πr. Therefore the length of a semi circle is πr. But the perimeter of a semi circle also includes the diameter which is 2r.

Therefore the perimeter of a semi circle = πr + 2r = r(π + 2)

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Q: What is formula of perimeter of semi circle?
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What is the formula for finding the perimeter of a semicircle?

Half the Circumference + the DiameterCircumference of a circle = pi X d ,so perimeter of a semi-circle = (3.142 X Diameter) + Diameter


Work out the perimeter of the semi-cirle when diameter is 15cm?

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How do you calculate the perimeter of a semi circle?

The perimater of a circle is the same as the circumference of a circle, but if it's only a half of a circle (semi-circle) you would use the formula 2*pi*r/2 If it's a quarter of a whole circle, or a fifth of a circle, then you would divide it by 4 or 5.


How do you find the perimeter for a semi circle?

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How do you find the perimeter of a rectangle with a semi circle attached to it?

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What is the formula of a perimeter of a circle?

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What is the perimeter of a semi circle?

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What is the formula for a semi-circle?

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What is the formula for finding the area of a semi-circle in terms of pi?

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What is the perimeter f a semi circle with a radius of 8?

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What is the formula of the sector of the circle?

There is no specific formula for a sector of a circle. There is a formula for its angle (at the centre), its perimeter, its area.