plz solve this problem urgently...
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to prove m is trisection point
we have to prove that
triangle ar RLM = 1/4 of ll gram ar
now in triangle
ar PSR = 1/2 ar of ll gram
and area of triangle
RSL = 1/2 area PSR
removing triangle RSM
SO area of triangle PSM = 1/2 ar MRL
Now join L to a point such that E
PE = SE
so area of SRL = ESL
so it will be
also
1/2 area of ll gram = ESL
there fore it is 1/3 of line
hence M is trisector