You need to use Mid point formula for Q1 and 3
Q.1) FIRST find out the midpoint of seg AB.. Lets call it as M.. then find midpoint of segAM and MB...
these will br required M points..
Q.3) Simply use midpoint for all the sides
MID-POINT formula is
A =(x1 , y1) B = (x2 , y2) then M = [ (X1+X2) /2 , (Y1+Y2) /2 ]
Q.2) find out the midpoint for a side and then find its distance from the opposite vertex.. that wil be length of that median.. do the same for all the three vertices...