A chord of length 12 units in a circle of radius 10 units is ______ units away from its centre.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 8.
Chord (l) = 12 units and Radius (r) = 10 units
Perpendicular distance from center to the chord (d) = √[r2 - (l/2)2]
= √[102 - (12/2)2]
= √[102 - 62]
= √(100 - 36)
= √64
= 8 units