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A semicircle is half a circle. So the perimeter of a semicircle is half the circumference of the whole circle plus the diameter, which is twice the radius:

perimeter = 1/2 x 2{pi}r + 2r

perimeter ~= 3.14x8 + 2x8 ~= 41.13cm

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Q: What is the perimeter of a semicircle with radius 8cm?
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Related questions

What is the perimeter of a 8cm semicircle?

8*pi + 16 = 41.13 cm (approx)It depends on whether 8 cm is the radius or diameter of the semicircle.


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.


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The perimeter of a semicircle with radius R is pi*R + 2*R = R*(pi + 2)


What is the perimeter of a semicircle if the diameter is 8cm?

Well, darling, the perimeter of a semicircle is the sum of the semicircle's curved edge (half the circumference of a full circle) and the diameter. So, with a diameter of 8cm, the curved edge would be half of the circumference of a circle with a diameter of 8cm, which is 8π cm. Add that to the diameter, and you get a sassy perimeter of 8π + 8 cm, or approximately 33.13 cm.


What is the perimeter of a semicircle that is 5 inches?

The answer will depend on what measure of the semicircle is 5 inches: its radius or diameter.


What is the perimeter of a semicircle if it's radius is 280 cm?

Perimeter = (pi*280)+560 = 1439.645943 cm


How do you find the perimeter of a semicircle?

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How do you calculate the radius of s semicircle?

Calculating the radius of a semicircle depends on what information about the semicircle is given.


The radius of the semicircle is 5 feet and the dimensions of the rectangle are 10 ft by 16 ft The semicircle is attached to the width of it What is the perimeter?

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What is a semicircle?

a semicircle is half of a circle... so like a circle cut in half, in a straight line. just for some information you may also need in the future: area of a semicircle: multiply the radius by itself and then multiply that by pi (approx. 3.14). divide that by 2. perimeter (circumference) of a semicircle: pi times radius. hope that helps.


If the base of a semicircle is a feet What is its perimeter?

The circumference of a circle = 2π r = π a (where a is the base of the semicircle and is also the diameter of the circle) The perimeter of the semicircle = half the perimeter of the circle + the base length The perimeter of the semicircle = πa/2 + a = a(1 + π /2) feet


How do you find the diameter of a semicircle when radius is given?

The diameter of the semicircle will be twice the radius.