Multiple choice

The tangent intersects the circle's radius at a _____ angle.

  1. $90^o$
  2. $180^o$
  3. $270^o$
  4. $360^o$
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A Correct answer
Explanation

A tangent to a circle is always perpendicular to the radius at the point of contact.

AI explanation

A fundamental theorem of circle geometry states that a tangent to a circle is always perpendicular to the radius drawn to the exact point of tangency. Perpendicular lines intersect at an angle of 90 degrees. Therefore, the tangent intersects the circle's radius at a 90 degree angle.

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