Radius is always half the length of its diameter. Area of circle where r is the radius of the circle. Worksheet to calculate arc length and area of sector radians.
Area of circle where r is the radius of the circle.
Sometimes the word radius is used to refer to the line itself. The radius of a circle is the length of the line from the center to any point on its edge. How do you find the length of a circle with the radius. Finding The Unknown Radius Or Diameter Length Of A Circle.