![]() 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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