Geometry and TrigonometryMediumAngle between a tangent and a radius
Geometry and Trigonometry practice question
Line l is tangent to a circle with centre O at the point P. What is the measure, in degrees, of the angle between line l and the radius OP?
Answer: 90
A tangent is perpendicular to the radius drawn to the point of tangency.
Common wrong answers
- If you answered 0
- 0 treats the tangent as lying along the radius.
- If you answered 45
- 45 halves the right angle.
- If you answered 180
- 180 treats the tangent and radius as a straight line.
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