Multiple choice

Given a circle with centre $O.$ The smallest chord $PQ$ is of length $4$ cm, largest chord $AB$ is of length $10$ cm, and chord $EF$ is of length $7$ cm. Then, the radius of the circle is

  1. $3$ cm
  2. $2$ cm
  3. $5$ cm
  4. $3.5$ cm
Reveal answer Fill a bubble to check yourself
C Correct answer
AI explanation

The largest chord of any circle is its diameter, so the diameter of this circle is 10 cm. The radius is always exactly half of the diameter, calculated as 10 divided by 2. Therefore, the radius of the circle is 5 cm.

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