The name is "chord".If the line segment happens to go through the center of the circle, thenit is also given the additional name "diameter", and no other chord in thesame circle can be longer than that one is.
Given a circle with a diameter of 4, the circumference is: 12.6 (diameter x Pi = circumference).
Diameter of a circle = circumference/pi
If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi
Adjust the compass to the given line segment then construct the circle.
Circumference of a circle = diameter*pi Diameter of a circle = circumference/pi
Radius = Diameter/2.
Divide the circumference by pi (about 3.1416). The result is the circle's diameter.
Divide the diameter by 2.
Radius of a circle = diameter/2
The radius is half the diameter. The diameter is twice the radius. If the radius is 10 inches, the diameter is twice that, or 20 inches. The radius is any straight line that connects a point on the circle with it's center. The diameter is a line segment that connects two points on a cirle throught the center of the circle.Answer:Let r be the radius of the circle and d be the diameter of the circle. We know that the diameter = 2 * radius of the circle. Given the radius r = 10 inches. Diameter d = 2 * 10 Diameter = 20 inches.