For example if the radius is 4 cm long then we can multiply this by 2 to find the diameter. Where hk is the center of circle. Definition Of Pi Homeschool Math Math Classroom Math Formulas To find the radius of a circle with a circumference of 10 centimeters you have to do the following. . The formula used to calculate circle radius is. What is the diameter of the circle. You can also use the circumference and radius equation. Diameter Formula 2 Radius. The diameter of a circle is the length of a straight line drawn between two points on a circle where the line also passes through the centre of a circle or any two points on the circle as long as they are exactly 180 degrees apart. The area is 154cm2. Radius of the circle 3 units. The ratio of the circumference to diameter of both circles is. Multiplying both sides of the formula by gives us. Enter your answer as a mixed number in simplest f
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