5ft * Pi = Approximately 15.7ft
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If the diameter is 5 feet then the radius is 2.5 feet. If the circumference is 5 feet then the radius is 0.79577 feet.
The radius is 1/2 of the diameter. A diameter of 10 has a radius of 5.
The radius of the circle is the length between the middle of the circle and any of the sides. It is also half the lenght of the diameter.
The radius of a circle is half the length of its diameter. Therefore, if the diameter of the circle is 10 cm, the radius would be half of that, which is 5 cm. The formula to find the radius of a circle is r = d/2, where r is the radius and d is the diameter.
5 inches