A conservation biologist is studying the distribution of pyramidal orchid (Anacamptis pyramidalis) plants in a riverside nature reserve.
The diagram below shows a plan of the reserve, containing a triangular study zone situated immediately adjacent to the straight bank of a river.
The biologist records a total of 132 pyramidal orchid plants within this triangular study zone.
Calculate the density of pyramidal orchid plants in the study zone in plants per square metre (plants/m2\text{plants/m}^2plants/m2).
Use the formula:
area of a triangle=12×base×height \text{area of a triangle} = \frac{1}{2} \times \text{base} \times \text{height} area of a triangle=21×base×height