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first we find the circumference which is 2 pi r.then we divide it with half because we want half of circumference,my ans is 72 cm. peri meter is circumference divided by 2 then add diameter in ans

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13y ago
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13y ago

Multiply its diameter by (pi), or its radius by (2 pi).

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4y ago

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Q: How you find the perimeter of semi circle if diameter is 28 cm?
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How do you find the perimeter of a semi circle with a diameter of 12mm?

-- Find the circumference of a full circle with a diameter of 12 mm.-- The perimeter of the semi-circle is(1/2 the circumference of the full circle) + (the diameter).


How do you find the perimeter for a semi circle?

Its perimeter is half of its circumference plus its diameter


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

The perimeter of a full circle (circumference) is "pi" times the diameter. So the perimeter of a semi-circle will be half that; Perimeter = (pi/2) x (diameter).


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

add the perimeter of the rectangle, minus the side that'c covered by the semi circle. then, find the circumference of the semi circle [diameter x pi, divided by 2] and addd them together


What is formula of perimeter of semi circle?

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)


If diameter is 7 find perimeter of semi circle?

Pi times the diameter gives you the circumference. Then divide that answer by two. Then add in the diameter - and, voila, you have your answer as to the perimeter of a semicircle.


What is the Perimeter of semicircle and quadrant circles?

The semi-circle is 0.5 X pi X diameter + diameter The semi-circle is 0.5 X pi X diameter + diameter


Find the perimeter of a semicircle of diameter 10cm?

First find the circumference of the whole circle using Pi x diameter. Halve the answer and add the diameter. Thus: 3.1416 × 10 = 31.416 ÷ 2 + 10 = 25.708cm So the perimeter of the semi-circle is 25.7cm


What is the perimeter of a semi circle?

The perimeter of a full circle is 2*pi*r. Where, pi is the mathematical constant that is the ratio of any circle's circumference to its diameter, approximately equal to 3.14, and r is the radius of the circle. The perimeter of a semi circle, assumed to be half of a full circle is pi*r where pi and r are previously defined.


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


How do you find the perimeter of a shape that has a semicircle?

To find the perimeter of the curved section of the semi-circle: Perimeter of semicircle = Pi x radius If you also need to the find the perimeter of the straight part of the semicircle (the diameter), it is simply double the radius.


How do you find the diameter of a semi-circle?

It is the length of the base of the semi-circle.