Multiple choice

The tangent and radius of a circle at the point of contact are

  1. Parallel

  2. Not perpendicular

  3. Perpendicular

  4. None
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C Correct answer
Explanation

By geometric theorem, the tangent to a circle is always perpendicular to the radius at the point of contact.

AI explanation

By a fundamental theorem of tangents to a circle, the tangent at any point on the circle is always perpendicular to the radius drawn to that point of contact. This 90 degree relationship is a standard geometric property. Therefore, the tangent and radius are perpendicular.

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