# How to solve circumference and area of a circle

## How to Calculate the Circumference and Area of a Circle How to Find the Circumference and Area of a Circle. A circle is a two-dimensional line that forms a closed loop, where every point on that loop is an equal.

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If you need to solve some geometry exercises, this circumference calculator is the page for you. It is a tool specifically created to find the diameter, circumference and area of any circle. Read on to learn:. As is the case with all of our tools, the circumference calculator works in all directions - it is also a circumference to diameter calculator, and can be used to convert circumference to radius, circumference to area, radius to circumference, radius to diameter duh! If you want to draw a circle on the Cartesian plane, you might find this equation of a circle calculator useful. The circumference of a circle is the linear distance of a circle's edge. It is the same as the perimeter of a geometric figure, but the term 'perimeter' is used exclusively for polygons.

Students beginning geometry can expect to encounter problem sets that involve calculating the area and circumference of a circle. You can.
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In this article, we will consider a geometric figure that does not involve line segments, but is instead curved: the circle. We will apply what we know about algebra to the study of circles and thereby determine some of the properties of these figures. Imagine a point P having a specific location; next, imagine all the possible points that are some fixed distance r from point P. A few of these points are illustrated below. If we were to draw all of the infinite number of points that are a distance r from P, we would end up with a circle, which is shown below as a solid line. Thus, a circle is simply the set of all points equidistant that is, all the same distance from a center point P in the example above. The distance r from the center of the circle to the circle itself is called the radius; twice the radius 2 r is called the diameter.

If you're seeing this message, it means we're having trouble loading external resources on our website. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Math Basic geometry Area and perimeter Area and circumference of circles. Labeling parts of a circle. Practice: Radius and diameter.

## Finding circumference of a circle when given the area

A circle is a two-dimensional line that forms a closed loop, where every point on that loop is an equal distance from the center. - If you're seeing this message, it means we're having trouble loading external resources on our website.

## Calculating the circumference of a circle

Students beginning geometry can expect to encounter problem sets that involve calculating the area and circumference of a circle. You can solve these problems as long as you know the circle's radius and can do some simple multiplication. Calculating either the circumference or area of a circle requires knowing the circle's radius. A circle's radius is the distance from the center of the circle to any point on the edge of the circle. Radius is the same for all points on a circle's edge. One of your problems might give you diameter instead of radius and ask you to solve for area or circumference.

The distance around a rectangle or a square is as you might remember called the perimeter. The distance around a circle on the other hand is called the circumference c. A line that is drawn straight through the midpoint of a circle and that has its end points on the circle border is called the diameter d. Half of the diameter, or the distance from the midpoint to the circle border, is called the radius of the circle r. A line that is drawn straight through the midpoint of a circle and that has its end points on the circle border is called the diameter d Half of the diameter, or the distance from the midpoint to the circle border, is called the radius of the circle r. Share on Facebook. Search Pre-Algebra All courses.

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## Area of a circle

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o Identify some basic parts of a circle, such as the radius and diameter. o Calculate the circumference of a circle. o Calculate the area of a circle. In this article.
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