Calculating a circles diameter is easy if you know any of the other dimensions of the circle the radius the circumference or the area its also possible if you dont know any of the above dimensions but you do have a drawing of the circle if you want to know how to calculate the diameter of a circle just follow these steps. Do you have difficulty in finding the center and the radius of the general form of a circles equation if yes then relax be cool grouping of terms with variables x and y and completing the squares are not needed using these shortcuts are you ready to learn we usually look for the faster manual way or method on how to find the center and the radius . Diameter of a circle what is circle radius and diameter or arc and how to calculate radius dimensions area of circlec duration 1125 designing development manufacturing cnc programming . Calculating a circles diameter how to find the circles diameter depends on the information available if the circle is drawn to scale or if its an actual circle you can calculate the diameter by measuring from one side of the circle to another making sure the ruler passes through the circles center. If so create an alignment with the circle you want to measure as the origin ie the origin is in x and y and z is the through axis and the hole is 10mm diameter create a vector point at 051 some value in z to place the point within the hole 5 is the radius of the circle the ijk would be 0 10 for being a point in y
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