**How to Find the Circumference of a Circle Sciencing**

The radius of a circle, half of its diameter, can help you find the circumference in a couple of steps. First, double the radius to get the diameter (radius x 2, or radius + radius).... In 240 B.C. Eratosthenes, a Greek mathematician used geometry to calculate the circumference of the earth. He solved this problem by marking the position of the noontime sun at two different locations then he measured the angular difference between the two locations.

**Math Antics Circles Circumference And Area - YouTube**

Find the area of a circle given its radius, diameter, or circumference. If each square in the circle to the left has an area of 1 cm 2, you could count the total number of squares to get the area of this circle. Thus, if there were a total of 28.26 squares, the area of this circle would be 28.26 cm 2 However, it is easier to use one of the following formulas: or where is the area, and is... The arc length of a circle (that is, the distance a bug would have to crawl to go around the circle exactly once, staying on the circle the whole time) is called its circumference. The ratio of a circle's circumference to twice its radius is a constant, which we represent with the Greek letter Ï€ ("pi," pronounced "pie," like the circle-based dessert).

**Circle Area Circumference & Diameter Calculator**

Calculations of volumes, areas and circumference : Area : Circle, Sphere, Cone, Triangle. Parallelogram, Box, Trapezoid. Area of a circle: 3.1415 x r 2: Where r = radius of the circle: Circumference of a circle: 3.1415 x d: Where d = diameter of the circle: Volume of a sphere: 4 / 3 x 3.1415 x r 3: Where r = radius of the circle... Suppose that we have a circle of radius r, and that we draw two radii as shown above. The shaded area, bound by the two radii and the circumference is called a sector of a circle.

**Circle Area Circumference & Diameter Calculator**

Recall that the formula to get the circumference of a circle is 2 Ã—piÃ—r with pi = 3.141592653589793 Therefore, the circumference depends only on the size of r.... The radius of a circle, half of its diameter, can help you find the circumference in a couple of steps. First, double the radius to get the diameter (radius x 2, or radius + radius).

## How To Get The Circumference Of A Circle

### Circumference of a circle explained with examples

- Circumference Calculator Basic mathematics
- Circle Geometry Calculator - Rechneronline
- What is the circumference of a circle when the diameter is
- What is the circumference of a circle when the diameter is

## How To Get The Circumference Of A Circle

### 25/07/2014Â Â· Ancient Rome Did NOT Build THIS Part 2 - World's LARGEST Stone Columns - Lost Technology - Baalbek - Duration: 9:51. Bright Insight Recommended for you

- Amanda, The area of a circle is given by the formula A = Ï€ r 2, where A is the area and r is the radius. The circumference of a circle is C = 2 Ï€ r.
- Suppose that we have a circle of radius r, and that we draw two radii as shown above. The shaded area, bound by the two radii and the circumference is called a sector of a circle.
- Note: Trying to find the circumference of a circle? Know the radius? Then you can use the formula for the circumference of a circle to get the answer!
- Well, in order to find the circumference of a circle, you are going to need a circumference eqaution. Take your pick, you will get the same answer with each equation (if you don't, well then maybe you should just try coloring inside of the circles instead of trying to find their circumference.)

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