![]() Diameter = Circumference ÷ π (when the circumference is given).If the parameters like radius, circumference, or area are given then we can directly use the following formulas. The diameter of a circle can be calculated according to the given parameters. It is twice the length of the radius of a circle, i.e., Diameter = 2 × Radius. The diameter of a circle is a line segment that passes through the center of a circle and has two endpoints at the circumference. It is half the length of the diameter of a circle, i.e., Radius = Diameter/2. The radius of a circle is a line segment that starts from the center of a circle and ends at the circumference of the circle. The radius and diameter of a circle are two important parts of a circle that are interdependent on each other. For example, "⌀20" means the diameter of a circle is 20 units in dimensions. This phi symbol is used to describe the diameter of a circular section. The symbol used to represent the diameter in engineering is ⌀. Which Symbol is Used to Represent Diameter? It is the longest chord of the circle that meets the circumference at opposite ends. Diameter of a Sphere Formula Using VolumeįAQs on Diameter What is the Diameter of a Circle?Ī diameter is a straight line that passes through the center of a circle and divides the circle into two sections/ semicircles.It starts from the center and touches the circle's circumference at a point. It starts from the boundary of the circle and ends at the boundary itself. The length of the radius is smaller than the diameter. Radius is half of the length of the diameter.įor any circle, length of diameter > length of the radius. The diameter of a circle is twice its radius. Observe the table given below to understand diameter vs radius. They share a relationship in the form of an equation, Diameter = 2 × Radius. Both diameter and radius are parts of a circle that define various properties like the size of the circle, circumference, and area of a circle. Before moving on to the difference between diameter and radius, let us first talk about their similarities. There are some similarities and differences between diameter and radius. Hence, the diameter of the circle formula using area, D = 2√Area/πĪs we have already discussed, the length of the diameter is twice of radius. By substituting the value of radius as D/2, we get, A/π = (D/2) 2 ![]() We can derive the diameter of a circle formula using the area of the circle formula that is, area (A) = π(Radius) 2. Using this definition, the formula for the diameter is D = Radius × 2. Radius is the length of the line segment from the center of the circle to an endpoint on the circle and diameter is twice the length of the radius of the circle. The diameter formula using circumference is,ĭiameter = Circumference ÷ π Diameter of a Circle Using Radius The formula for the circumference of a circle is C = πd here, C = Circumference, d = Diameter of a circle, π = 22/7 or 3.142 approx. We can easily derive the diameter formula from the circumference. We can derive the diameter formula from the circumference, area, and radius of the circle. It is calculated using the formula πr 2, where 'r' is the radius.
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