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The length (circumference) of the curved part of a semi-circle is pi times the radius (pi*R). If the diameter is given, then the semi-circle length is 1/2 (pi * x D) because the radius is 1/2 of the diameter.

(There are 2pi radians in a full circle.)

A closed shape formed from a semi-circle has a perimeter P = D + (pi * D / 2)

(diameter plus the curved part)

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Q: How do you find the circumference of a semi-circle?
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Related questions

How do find the circumference of a recttangle and semicircle put together?

If the semicircle is placed on 1 side of the rectangle:Find the total perimeter(circumference) of the side opposite to the one with the semicircle's base and the 2 sides perpendicular to the semicircle's base.The formula for circumference of a circle is 2πr.Thus for the semicircle we will take the circumference as πr.Find the sum of 1st and 2nd points. This is the final answer.


How do we find a perimeter of a semicircle?

It is its diameter plus half of its circumference


How do you find the circumference of a semicicle?

circumference of a semicircle = pi * diameter / 2 (pi multiplied by the diameter and divided by 2)


How do you find the distance around a semicircle?

It is half the circle's circumference plus its diameter.


What is the approximate circumference of a semicircle with a radius of 30 centimeters?

You can multiply the radius by pi to get the length of the semicircle.


How do you figure the perimeter of a semicircle if the the straight side is 36?

Consider the straight side as the diameter of a circle, find the circumference of the circle, calculate half the circumference and then add it to the diameter. circumference = pi x diameter = 3.14 x 36 = 113.04 perimeter of semicircle = 1/2 circumference + 36 = 56.52 + 36 = 92.52


If the circumference of the circle is 20cm what is the length of the thick semicircle?

10


How do you find the perimeter of a semicircle?

The circumference of a semicircle is pi times the radius plus the diameter.


What is the circumference of 52 m semicircle?

circumference or perimeter of the semi-circle = (diameter*pi)/2 + diameter


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 approximate circumference of a semicircle with a diameter of 64 meters?

401.92 m


What is a circle equal to one half of a circumference?

It is a semicircle.