When the shape is a circle, then the perimeter is called"circumference".The circumference IS the perimeter of a circle.
perimeter = circumference
Circumference ("perimeter") of a circle = (pi) x (diameter of the circle)
The equivalent of a "perimeter" in a circle is actually called its circumference. To get the diameter, just divide the circumference by pi.
The circumference of a circle is 11\piπ ft. Find its radius, in feet./The circumference of a circle is 11\piπ ft. The Answer Should Be 5.5
-- 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).
Its perimeter is half of its circumference plus its diameter
The perimeter or circumference of a circle = diameter times pi
The perimeter of a circle is the circumference. If you mean the circle is drawn around (and touches the 4 corners of) a square, and you know the perimeter of the square, you divide the square's perimeter by 4, do pythagorean's theorem on the 2 sides (legs) to find the hypotenuse, and that hypotenuse will be the diameter of the circle. You then multiply that diameter you get by pi to get the circumference.
Since pi is the ratio of a circle's circumference to its diameter, multiply the diameter by pi (about 3.14159) to get the circumference.
As for example when constructing a round-about on a road you'll need to know its perimeter which is the circumference of a circle.
A circle does not have a perimeter, but it has a circumference, which is pretty much the same thing. To find the circumference, multiply pi(3.14) times the diameter which is the distance across the center of the circle. I hope this helped