Triangle ABC similar to triangle pqr area of triangle ABC equals to 81 cm square and area of triangle pqr equal to 121 CM square if altitude area equal to 9 cm and pm equals to______.
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area of triangle PQR/
area of triangle ABC
= PM^2/AD^2
=> 121/81. = PM^2/9^2
=> 121 = PM^2
=> 11cm = PM.
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