Question

please help me anyone!!!​

Answer 1

Answer:

3cm

Step-by-step explanation:

OA^2+OC^2=OB^2+OD^2[it's a derivation]

4^2+2^2=root 11^2+OD^2

16+4=11+OD^2

OD=root9

=3cm

Mark me as brainliest if you wish

Hope it helps