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Subjects>Math>Geometry

What is the perimeter of a semicircle with radius 8cm?

Anonymous

∙ 15y ago

Updated: 1/25/2025

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

Wiki User

∙ 15y ago

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More answers

The perimeter of a semicircle is the sum of the curved edge (half the circumference of a full circle) and the diameter (straight edge). The circumference of a full circle with radius 8cm is 2πr, which equals 16π cm. Therefore, the curved edge of the semicircle is half of this, which is 8π cm. The diameter of the semicircle is twice the radius, so it is 16cm. Adding the curved edge and the diameter together, the perimeter of the semicircle is 8π + 16 = 8π + 16 cm.

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∙ 2mo ago

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

To find the perimeter of a semicircle, you need to add the curved edge (half the circumference of a full circle) to the diameter of the semicircle. The formula for the circumference of a full circle is C = πd, where d is the diameter. Therefore, the circumference of the full circle is π(8) = 8π cm. The perimeter of the semicircle would be half of the circumference of the full circle plus the diameter, so it would be 4π + 8 cm, or approximately 20.28 cm.

How do you calculate the radius of s semicircle?

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

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

What is the diameter of a semicircle with a radius of 5 ft?

Radius is = to half the diameter so.... when the radius of the semicircle is 5ft then the diameter is 10ft.

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