![]() Solved Example 1: Determine the radius of a circular disk whose diameter is 18.6 cm. Well acknowledged with the definition, how to find the radius and various formulas for the radius of the circle, let us step forward and practise some solved examples. \(\large R\text\) Solved Example on Radius of a Circle Let us proceed forward and find the radius of a circle formula using the diameter, circumference and area. In the previous heading, you saw the radius of a circle formula can be determined with the diameter, area and circumference of a given circle. If in case the center of the circle is at origin that is the coordinate of the centre is (0,0), then the equation of the circle becomes:Ĭircles are one of the most regularly found patterns in the world, therefore the radius of the circle formula and its calculation are important. (h,k) are the coordinates of the center of the circle.The radius of a circle equation in the cartesian coordinate geometry plane is given by the formula: For any circle in mathematics, the common notation used to denote the radius is ‘R’ or ‘r’. A circle is defined as a two-dimensional shape, which occupies its area and perimeter. In simple words, we can say that, when we join the center of a circle to any point over the circumference applying a straight line, then that line is termed as the radius of that circle. The radius of a circle is defined as the distance measured from the centre of the circle to any point on its circumference. ![]() Also, the diameter in a circle is the line that separates the circle into two equal parts and is equal to twice the radius.ĭefinition of Radius of a Circle : Radius of a Circle is the length between the center of the circle to any location on its boundary. The measure from the centre of the circle to the outer line is its radius. A circle is also termed as the locus of the points drawn at equidistant levels from the centre. The Radius of Outer Circle of Annulus given Area and Perimeter formula is defined as straight line from centre to the outer circumference of Annulus, calculated using Area and Perimeter is calculated using Outer circle radius of Annulus ((Perimeter of Annulus /(2 pi))+((Area of Annulus / pi)/(Perimeter of Annulus /(2 pi))))/2.
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