What is diameter of a circle

The radius and diameter of a circle are two important parts of a circle that are interdependent on each other. The radius of a circle is a line segment that starts from the center of a circle and ends at the circumference of the circle. It is half the length of the diameter of a circle, i.

The diameter of a circle is a line segment that passes through the center of a circle and has two endpoints at the circumference. It is twice the length of the radius of a circle, i.

The diameter of a circle can be calculated according to the given parameters. If the parameters like radius, circumference, or area are given then we can directly use the following formulas. If you observe the wheel of a cycle, the spikes run from one end to another end through the center.

We can relate this to the diameter of a circle, as the diameter is the line segment that starts from one end of a circle and ends at the other end of the circle passing through the center. If the diameter is given we can find the radius by dividing the value of diameter by 2. The diameter to circumference calculator is an online tool used to determine the value of the circumference of a circle. In the diameter to circumference calculator enter the dimension of the diameter and get the value of circumference within a few seconds.

You can also try the diameter calculator for direct calculations. If the radius of a circle is given in 'r' units then it is easy to determine the diameter of the circle formula. The diameter of a circle is a line segment from one end of the circle to the other end of the circle passing through the center of the circle. Whereas, the radius of a circle is the length of the line segment from the center of a circle to a point on the circumference of the circle.

Hence, the radius is half of the diameter of a circle. The radius of a circle is half the diameter. No, the diameter is not half of the radius; it is twice the radius of a circle. Learn Practice Download. Diameter of a Circle In a circle, diameter is a line that passes through the center and meets the circumference at each end.

Calculating a circle's diameter is easy if you know any of the other dimensions of the circle: the radius, the circumference, or the area. It's also possible if you don't know any of the above dimensions but you do have a drawing of the circle. If you want to know how to calculate the diameter of a circle, just follow these steps. Example If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm.

This equals cm 2. To calculate the diameter of a circle, multiply the radius by 2. Then, you can just multiply the radius by 2 to find the circle's diameter. Read the article to learn how to calculate the diameter of a circle using a ruler!

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Cookie Settings. Learn why people trust wikiHow. Download Article Explore this Article methods. Calculation Help. Tips and Warnings. Things You'll Need. Related Articles. Article Summary. Author Info Last Updated: May 8, Method 1.

If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. Method 2. Draw a horizontal line inside the circle from one edge to the other. Measure the lengths of the two diameters. Any line drawn from the centre O, to the boundary or edge of the circle is a radius of the circle.

In the figure above, OP is a radius. OQ is another radius. You will also note that the radius is equal to half the diameter. Find the radius of the circle below. Practice Radius Questions. The diameter of a circle if 20 m. What is its radius?

Practice Diameter Questions. Find the diameter of the circle below. The radius of a circle is 15 m.