What is the area of triangle LMN? Round to the nearest square meter.

The answer is 9 square meters.

Here I think the given data was LM=7, MN=6 and perimeter was given by 16m

As we know perimeter is the sum of all the sides

so Perimeter=LM+MN+NL

NL=Perimeter - (LM+MN)

NL=16-7-6

NL=3

By Heron's formula

Area=sqrt (s (s-a) (s-b) (s-c)).

where s=perimeter/2

so s=16/2=8

area=sqrt (8 (8-7) (8-6) (8-3))

area=8.94427191

after rounding off

area=9