Question

please answer this question​

Answer 1

Bcoz BL is perpendicular to AD
That is why AD is median of triangle ABC

Answer 2

Step-by-step explanation:

in the above diagram

bl=cm

and

angle BDA=angle CDM

angle BLD = angle CMD (90 Degree)

thus, by AAS theorem

∆ABD is congurent to ∆MCD

thus

BD=CD (By CPCT)

So,

AD is the median