Answer:
Diameter = 7, Radius = 3.5
Radius = 9, Diameter = 18
Diameter = 12, Radius = 6
Radius = 2.5, Diameter = 5
Explanation:
The diameter is the largest line that can be drawn in a circle. It passes from one end of the circle to another, and it goes through the center of the circle. The radius is a line drawn from the center of the circle to the circumference of a circle. By its definition, the radius will always be half of the diameter. Use this information to find the radius of the circle when given the diameter,
Diameter = 7, Radius = 3.5
Radius = 9, Diameter = 18
Diameter = 12, Radius = 6
Radius = 2.5, Diameter = 5