How To Find The Diameter Of A Circle With Circumference

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Calculating a circumvolve's diameter is piece of cake if you know any of the other dimensions of the circle: the radius, the circumference, or the area. It'southward also possible if you don't know any of the above dimensions but you practise have a drawing of the circle. If you want to know how to summate the diameter of a circle, just follow these steps.

Calculation Help

1

If y'all know the radius of the circle, double it to get the diameter. The radius is the distance from the heart of the circle to its edge.^[one]

Example
If the radius of the circumvolve is four cm, then the diameter of the circumvolve is 4 cm x two, or 8 cm.
two

If you know the circumference of the circumvolve, divide information technology by π to get the diameter.

π is equal to approximately iii.14

but y'all should apply your calculator to get the nigh accurate results.^[2]

Example
If the circumference of the circle is x cm, then the bore is x cm/π, or three.xviii cm.

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3

If y'all know the area of the circumvolve, divide the result by π and find its square root to become the radius; so multiply by two to get the diameter. This goes dorsum to manipulating the formula for finding the area of a circle, A = πrⁱⁱ, to become the diameter. You can transform this into r = √(A/π) cm.^[3]

Case
If the area of the circle is 25 cm², divide that by π and find the square root.
This equals cm ii.82cm, so the diameter of the circle is two.82 10 2 = 5.64cm.

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1

Draw a horizontal line inside the circle from one border to the other. Use a ruler or a straight edge to do this.

Information technology tin can exist at the top, near the bottom, or anywhere in between.
2

Characterization the points where the line crosses the circle points "A" and "B."
3

Draw two overlapping circles, one using A as the center and the other using B equally the middle. Be sure the two circles overlap similar a Venn diagram.
4

Draw a vertical line through the 2 points at which the outer circles intersect. This line marks the bore of the circle4.
five

Measure the bore.

Measure out information technology using a ruler,

or for greater accuracy, a pair of digital calipers. You're done!

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Question

What is diference between radius and diameter?

The radius is half the diameter.
Question

If I have the circumference, how tin I summate diameter?

Divide the circumference by pi.
Question

The radius of a dinner plate is 6 cm; what is the diameter?

Since the radius is half the diameter, to get the diameter, you'd multiply the 6 cm past 2. The diameter of this circular dinner plate is 12 cm.
Question

What is the area of a circle?

The area of a circle is area=πr2, or pi * the radius squared, make certain to outset foursquare the radius then multiply that by pi.
Question

How do I trace a circumvolve with a diameter of 4 cm?

You lot have a couple options. Detect something that is four cm in diameter (or slightly smaller) and draw around it. Use a compass set to a radius of 2 cm. Utilize a drawing program and set the circle backdrop then that it has a diameter of four cm. Finally, use metric graph paper and plot the graph of x2 + y2 = four. (1 unit = 1 cm).
Question

How practise I find the area of a circle that has a perimeter of 36 cm?

Divide the circumference (perimeter) by pi. That gives you the diameter. Half of that is the radius. To become the surface area, square the radius, and and then multiply by pi.
Question

How do I summate the circumference of a circle to the diameter?

Danoyachtcapt

Top Answerer

C = three.14 x d
Question

What is the bore of a ball with a volume of 288?

The diameter is equal to the cube root of the following: half dozen times the volume divided by pi.
Question

How can I find the coordinates of a bore?

The diameter is formed from the center of one side of a circle to the other, meaning that in that location are no coordinates since the diameter is always located in the center of the circumvolve.
Question

If my radius is 20ft, how can I discover the diameter?

Double the radius.

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Using geometrical formulas and equations gets easier with practice. Enquire for help from someone who has worked with circles or any other geometrical figures. Y'all're likely to find that questions of geometry volition seem less challenging with a little experience.
Familiarize yourself with the apply of a compass (the drawing tool, non the direction-finder). This is a very useful instrument in many applications, including cartoon a circumvolve's bore, equally outlined above. A divider (an instrument like to a compass) tin can sometimes be used in such cases.^[4]

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Things You'll Demand

Computer
Pencil with an eraser
Compass
Ruler
Digital calipers(optional)

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Article Summary X

To calculate the bore of a circle, multiply the radius by 2. If you don't have the radius, divide the circumference of the circle by π to get the diameter. If you don't take the radius or the circumference, divide the surface area of the circle by π and then find that number's square root to get the radius. Then, you can just multiply the radius by 2 to detect the circle's diameter. Read the article to learn how to calculate the diameter of a circle using a ruler!

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