The question consists of two statements, namely, Assertion (A) and Reason (R). For selecting the correct answer:
Assertion (A) | Reason (R) |
The radius of a circle is 10 cm and the length of one of its chords is 16 cm. Then, the distance of the chord from the centre is 6 cm. | The perpendicular from the centre of a circle to a chord (other than the diameter) bisects the chord. |
Assertion (A) :
Let O be the centre of the circle and AB be the chord
Construction: Draw, L is the midpoint of AB
Here,
OA = 10cm
AL = AB = 8cm
In ΔOAL,
OL2 = OA 2 – AL2
OL2 = (10)2 – (8) 2
OL2 = 100 – 64
OL = = 6cm
Thus, Assertion (A) is true.
Clearly, reason (R) given Assertion (A).
Hence, the correct choice is A.