Q: Line touching the circumference of a circle?

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A straight line touching the circumference of circle at one point is a tangent

The reflection in a line will be another congruent circle.

Any line that passes through a circle and touches two points on its circumference is a secant line. (Recall that a line is infinitely long.) If the line passes through the center of the circle, it is still called a secant line. Compare this to a line segment that has its endpoints on the circumference of the circle. That line segment is called the cord of the circle. If that cord passes through the center of the circle, it is a diameter of the circle, which is the longest cord of that circle.

A diameter is a straight line from one side of a circle, through the centre, to the other side. A circumference is the curved line forming the boundary of a circle.

Diameter is the length of a straight line passing through the center of a circle or sphere and connecting two points on the circumference of the circle or the surface of the sphere. Circumference is the length of the closed curve of a circle.

Related questions

A straight line touching the circumference of circle at one point is a tangent

A circle has one curved line and it is its circumference

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.

The circumference of a circle is a line. Because it is a line it has no area, only length. So the area of the circumference cannot exist!

Is a tangent

a curved line that is part of the circumference of a circle

It is the tangent 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

The reflection in a line will be another congruent circle.

A tangent line.

Well the radius is only half of the line on the circle the circumference is all around

The diameter of a circle is the length of a line passing through the center of a circle that connects two points on the circumference. The circumference is the distance around the edge of a circle.