Question

AB and CD are two equal chord of a O centered circle. Distance from centre to chord AB is 4cm. Find the length of chord CD. ​

Answer 1

Answer:

Make the isosceles triangle then find the answrr

. You will get by pythagorus theorem.

Answer 2

Answer:

given = AB=CD ( EQUAL CHORDS)

LET THE DISTANCE BETWEEN CHORD AB AND CENTRE OF CIRCLE BE ON WHICH IS 4cm

AN = BN ( SINCE THE LINE PASSING THROUGH FROM  THE CENTRE INTERSECTING THE CHORD BISECT THE CHORD

SO LET AO BE X

AO²=AN²+ON²

X²=4²+AN²

AN²=X²-16                      (1)

SIMILARLY

BO²=X²-16                      (2)

FROM (1) AND (2)