Multiple choice

What is longest chord of a circle with radius $10\ cm$.

  1. $10\ cm$
  2. $5\ cm$
  3. $20\ cm$
  4. $15\ cm$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The longest chord of any circle is its diameter. Since the radius is 10 cm, the diameter is 2 * 10 cm = 20 cm.

AI explanation

The longest chord of a circle is its diameter. Using the diameter formula d = 2r with the given radius of 10 cm, we get d = 2*10 = 20 cm. The longest chord is 20 cm.

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