![]() The diameter is twice the radius of the circle. The figure given below shows a circle whose radius is \(r\) and the centre is \(O\). ![]() Second Method: A correct way of knowing the circumference of a circle is to calculate it if the radius or diameter is known. Now, calculate this length by using a ruler. Trace the path of the circle by using a thread and mark the points on the thread. Download all these free printables and learn to find the circumference of a circle. It is calculated using the formula: Lot of Worksheets are given here to find the circumference using the radius and diameter both in customary and metric units. For instance, if the area ( A) of a circle is 15 square units, enter 2 ( (15/)) into your calculator. Circumference is the perimeter of the circle. Use the area given by the problem to solve for the circumference. Instead, we can calculate the circumference of a circle using a thread. Plug in the numbers to find the circumference. You can use Next Quiz button to check new set of questions in the quiz. If you are not sure about the answer then you can check the answer using Show Answer button. You will have to read all the given answers and click over the correct answer. But it can be done for polygons like triangles, squares, and rectangles. Following quiz provides Multiple Choice Questions (MCQs) related to Circumference of a Circle. How to find the circumference of a circle?Īns: First Method: Since the surface of the circle is curved, we can’t physically calculate the length of a circle by using a scale or ruler. The Area of a circle is half times the radius times the circumference of a circle. Therefore, to establish the relationship between the circumference of a circle and its area. Ans: Let \(^2\)Īnd the circumference of the circle \(= 2\pi r\)
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