What is the center, diameter, chord, and radius of circle mean? A circle is a two-dimensional shape. A circle has a center, diameter, radius, and a chord. When it comes to finding the area, circumference, or solving circle problems, students need to have a clear understanding of each of these terms. Starting from the primary term, the center. So, what is the center of a circle? It is the point equidistant from the points on edge. A circle is mostly created using a compass, where the pointed end is placed, it serves as the center. Moving on the diameter and radius of a circle. Radius is the distance from the center towards the circumference or boundary of the circle. The diameter goes straight across the circle, through the center and it is twice of a radius. A chord is another measurement of circles, which often confuses a lot of students. Remember that it is not the diameter. It is a straight-line segment with its endpoints lying on the circle. The infinite line extension of a chord is a secant line or just secant. More generally, a chord is a line segment joining two points on any curve, for instance, an ellipse.

This collection of worksheets is like the study of circle anatomy. Students will construct circles and find the measures of already created circles. They will learn that the radius of a circle is a line drawn from any part of the circle to the direct center of the circle. Diameter is the length of line drawn through a circle that passes directly through the center. Circumference is the distance around a circle and can be calculated with by taking the product of the radius by two-Pi. These worksheets explain how to find the radius, diameter, circumference, perimeter, and area of circles. Different types of measurement units are used, and may include fractions or decimals.