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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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12y ago
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12y ago

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

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3y 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 diameter of a semi-circle?

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


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.