A diameter bisects a circle.
A straight line from the center to the edge of a circle is called a radius. The radius measures the distance from the center to any point on the circumference of the circle.
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.
Bisecting the line.
A straight line from the center to the edge of a circle is called a radius. The radius measures the distance from the center to any point on the circumference of the circle.
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.
The tangent.
Tangent.
It is the radius
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.