Chord is a line segment on the interior of a circle with both its endpoints lying on the circle.
In the circle shown, PQ and AB are chords with their endpoints P, Q and A, B respectively lying on the circle.
A. 10 cm
B. 5 cm
C. 1 cm
D. 2 cm
Correct Answer: A
Step 1: The longest chord of a circle is its diameter.
Step 2: So, the length of the longest chord is 10 cm.