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Draw a line that passes through the center of the circle (if the center is not marked, you can still find it by various means of geometrical construction, if you have a compass, or by slowly pulling a ruler down through the circle and seeing where the measurement of the circle is largest). The line that passes through the center, going from one side of the circumference to the other, is the diameter. The radius is simply half the diameter and can be measured directly, with a ruler. Once you have that figure, you can calculate the circumference. The circumference is equal to pi times the diameter, or two pi times the radius. Pi is equal to approximately 3.1415 which is close enough for all usual purposes.
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How do i find circumference and area of a circle?
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
How do you find the circumference of a circle with a radius of 4?
Circumference of a circle = 2*pi*radius = 8*pi or 25.13274123 units
When you know the circumference of a circle how do you find the diameter?
If you know the circumference of a circle, you can find the radius by dividing the circumference by the value of Pi (3.14159...)
How do you find radius of circle?
Measure the distance from the centre of the circle to its circumference.
What is the radius and the area of a circle?
The radius of a circle is the distance from the center to any point on the circle. The area is the space within the circle. The formula to find the area is πr2. r stands for the radius of the circle. If you want to find the radius, you can work backwards from the area or the circumference, which is the perimeter of the circle. The formula for circumference is 2πr.
How do you find the radius of a circle with the circumference in terms of pi?
find the radius of a circle with circumference of 42.1
How do you find circumference of a circle if you have radius?
For a circle, circumference = 2 x pi x radius.
What is the circumference of a circle with a radius of In?
A circle with a radius of 8 inches has a circumference of 50.27 inches.
How do you find circumference using radius'?
Circumference of a circle = 2*pi*radius
How do you find the radious of a circle can you find the circumference?
The radius of a circle is the distance from its centre to its circumference. If a circle has a radius of r units then the length of its circumference is 2*pi*r units.
If the area of a circle is 201.06 then the circumference of the circle is?
The formula to find the circumference of a circle is C = 2πr, where r is the radius of the circle. To find the circumference, you first need to find the radius by using the formula for the area of a circle (A = πr^2). Given that the area is 201.06, you can solve for the radius. Once you have the radius, you can plug it into the formula C = 2πr to find the circumference.
How do find the circumference of a circle?
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
Find the circumference of a circle with a radius of 5.6?
Circumference of a circle = 2*pi*radius Circumference = 2*pi*5.6 = 35.18583772 units
How can you find the circumference of circle?
Circumference of a circle = 2*pi*radius or diameter*pi
How do i find circumference and area of a circle?
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
How do you find the circumference of a circle with a radius of 4?
Circumference of a circle = 2*pi*radius = 8*pi or 25.13274123 units
The radius of a circle is 5 inches Find the circumference of the circle?
Circumference = 2 x pi x radius = 31.4159
