The name of a straight line joining two points on the circumference of a circle is a chord.If the line passes through the the centre of the circle it is called a diameter
radius
A tangent. And it does not need to be a circle - it can be any curve.
The tangent.
That's called the radius.
Bisecting the line.
The name of a straight line joining two points on the circumference of a circle is a chord.If the line passes through the the centre of the circle it is called a diameter
radius
radius
A tangent. And it does not need to be a circle - it can be any curve.
It is the radius
Tangent.
The tangent.
That's called the radius.
Tangent
The curved line that traces the boundary or perimeter of a circle is called the circumference. A straight line that touches the circle at just one point is called a tangent. See the related link, 'The Parts of the Circle', below this answer.
It is called the diameter. The line that goes halfway through the circle is the radius.The length of a straight line through the center of a circle is called the diameter. Any other object I'm not sure has a name; perhaps the length...width...or height