Question

solve it very fast
question of the day​

Answer 1

Answer:

See picture

We need to prove

$y + z > 2m$

To do that extended AD to E such that DE = m

Now observe in

∆ADE & ∆CDB

AD = CD ( Median )

CD = DE = m

Angle ADE = CDB ( opposite angles )

So both are congruent

EA = BC = z

Finally

Use property in a triangle a side is less then sum of other two sides in ∆ACE .

$y + z < 2m$