Circle (Radius, Diameter, Circumference)
A circle is a closed curve that is formed by all the points in a plane that are equidistant from a fixed center point
A circle is a closed curve that is formed by all the points in a plane that are equidistant from a fixed center point. Here are some key terms related to circles:
1. Radius: The radius of a circle is the distance from the center of the circle to any point on its circumference. It is denoted by the letter “r”. The radius is half the length of the diameter.
2. Diameter: The diameter of a circle is the distance across the circle passing through the center. It can be calculated by multiplying the radius by 2. It is denoted by the letter “d”. The diameter is twice the length of the radius.
3. Circumference: The circumference of a circle is the distance around its outer boundary or perimeter. It is the total length of the circle. The circumference can be calculated using the formula C = πd or C = 2πr, where “C” represents the circumference, “d” is the diameter, and “r” is the radius. The symbol π (pi) is a mathematical constant which is approximately equal to 3.14159.
It’s important to note that for any given circle, the radius, diameter, and circumference are all proportional. This means that if you know the value of one of them, you can easily find the values of the others using basic formulas or calculations.
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