Multiple choice

A chord of a circle is equal to its radius. The angle subtended by this chord at a point on the circumference is

  1. 80°

  2. 60°

  3. 30°

  4. 90°
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C Correct answer
AI explanation

If a chord equals the radius, the triangle formed by the two radii and the chord is equilateral, meaning the angle subtended at the center is 60 degrees. The angle subtended by the same chord at a point on the remaining part of the circumference is half the angle subtended at the center. Therefore, dividing 60 degrees by 2 gives the angle at the circumference as 30 degrees.

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