Question

pls solve this question​

Answer 1

Answer:

InΔAMC,

AC

2

=AM

2

+CM

2

[By Pythagoras Theorem]....(i)

InΔAMD,

AD

2

=AM

2

+DM

2

[By Pythagoras Theorem]....(ii)

∴AM

2

=AD

2

−DM

2

⇒AC

2

=[AD

2

−DM

2

]+CM

2

AC

2

=AD

2

−DM

2

+(DC+DM)

2

=AD

2

−DM

2

+DC

2

+2DC.DM+DM

2

=AD

2

+DC

2

+2DC.DM

=AD

2

+(

2

BC

)

2

+2

2

BC

DM

AC

2

=AD

2

+BC.DM+

4

BC

2