[tex]\begin{gathered} To\text{ get the median AY, BZ, CX} \\ (1)\text{Then we n}eed\text{ to bisect the sides at AB,B}CandAC,\text{ and join the mid points respectively to C,A and B } \\ (2)To\text{ for the Altitude, the i n}eed\text{ to bisect the angles A,B and C and then i get the mid point(P).} \end{gathered}[/tex]