The polygon with three vertices is,
The polygon is triangle with base b = 5 units and height h = 3 units.
Determine the area of polygon.
[tex]\begin{gathered} A=\frac{1}{2}\cdot b\cdot h \\ =\frac{1}{2}\cdot5\cdot3 \\ =\frac{15}{2} \\ =7.5 \end{gathered}[/tex]So area of figure is 7.5 square unit.
