Question

Circle 0, = circle 0,. If the radius of circle 0, = 5 cm, then the radius
of circle O, is​

Answer 1

Answer:

b

Step-by-step explanation:

B

6 cm

Radius of a circle is 5 cm.

Therefore OB = 5 cm.

Perpendicular drawn to the chord from the centre bisects the chord.

Therefore AM = MB

Triangle OMB is right angled triangle at M

∠OMB=90∘

By Pythagoras theorem;

OB2=OM2+MB2

MB=OB2−OM2

 MB=52−42

MB=3cm

So, the length of chord AB=2.(MB)=6cm.

Option B will be the answer.