Multiple choice

A perpendicular at the end of the radius of a circle is

  1. diameter

  2. tangent

  3. chord

  4. anyline
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

By definition, a line drawn perpendicular to the radius at its point of contact with the circle is a tangent.

AI explanation

By the tangent-radius theorem, a line drawn perpendicular to the radius of a circle at its outer endpoint (on the circle) forms a 90-degree angle with the radius. This perpendicular line touches the circle at exactly that single point, which defines it geometrically as a tangent. Hence, the perpendicular line is a tangent.

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