Line through the center of a circle is the diameter or distance across the circle.
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Construct a circle with a compass and then draw a straight line through its centre
A circle with a straight line through it, usually at an angle, and often with a small dot where the centre of the circle would be (also on the line, to clarify that the line does go through the centre).
A chord is a straight line that spans the circumference of a circle and the diameter of a circle is a straight line in a circle spanning its circumference and passing through the circle's centre.
A diameter goes all the way across a circle through the center. A radius goes half way across, from the center to any point on the circle. So a circle's diameter is two times its radius.All the way through the centre of the circle but the radius only goes half way from the centre of the circle
The diameter of a circle is a straight line going from one point on its boundary, through the centre of the circle, to the boundary on the other side.