Question

If OA = 5 cm and OC = 3 cm, then find the length of AB. What is the name of two circles having a common

centre​

Answer 1

Answer:

Given OA=5CM

OM=3CM

∠OMA=

90

˚

So by Pythagoras theorem,

AM

2

=OA

2

−OM

2

AM

2

=5

2

−3

2

AM=4cm

We know that perpendicular from centre bisects the chord

Therefore AB=2AM

AB=8cm