Question

the line that intersects a circle exactly one point is called

Answer 1

The line that intersects a circle at a point is called tangent.

It is by definition and there is nothing to explain further.

There can be two tangents that can be drawn from an external point to the circle.

Hope it helps you.

Thanks.

Answer 2

The line that intersects a circle exactly one point is called a tangent.

• It is a straight line that can be drawn from an external point or at infinity and it touches the edge of the curved part or circle only at one point.
• It does not cross or intersect the point on the circle.
• The tangent is drawn from an external point that touches the circle then it is perpendicular to the radius of the circle.
• There can exist multiple tangents for a given circle but each tangent touches only one point on the circle.