What is Radius?
The distance from the center of a circle to any point on the circle itself is exactly the same. This distance is called the radius of the circle.
What is Diameter?
The diameter is the length of the line through the center that touches two points on the edge of the circle.
TOP DIFFERENCES BETWEEN RADIUS AND DIAMETER:
|The radius is the length from the midpoint of the circle to the outer edge of the circle.||Diameter is the full length of the circle running from the edge, through the midpoint, all the way to the other side.|
|The radius is represented by the lowercase letter “r.”||The diameter of a circle is represented by the letter “d.”|
|The radius of a circle runs from its center to its edge.||diameter runs from edge to edge and cuts through the center.|
|radius (r=d2)!||diameter (d=2r)|
The Radius is the distance from the center outwards. The Diameter goes straight across the circle, through the center. The Circumference is the distance once around the circle. Both Radius and Diameter are related to a circle only.