Question

AO =17cm
OL perpendicular bisector of AB
AB = 30cm
find OL​

Answer 1

Answer:

Step-by-step explanation:

OA and OD are the radii of the circle

by Pythagoras theorem in right triangle OCA

AO  

2

=OC  

2

+AC  

2

 

OC=  

OA  

2

−AC  

2

 

​  

 

OC=  

17  

2

−15  

2

 

​  

             [perpendicular drawn from cenentre bisect the chord]

OC=8cm

CD=OD−OC

CD=17cm−8cm

CD=9cm

So, option  B is the  answer.