Find the area of the quadrilateral whose vertices are
A(-4,-2), B(0,5), C(9,3) and D(7,-4).
I thought it was a trapezoid after plotting and connecting each point and thus my answer was area = 40 but I was wrong.
[quote=magentarita;282648]Find the area of the quadrilateral whose vertices are
A(-4,-2), B(0,5), C(9,3) and D(7,-4).
I thought it was a trapezoid after plotting and connecting each point and thus my answer was area = 40 but I was wrong.[/quote
ignore this
I've attached a sketch of the quadrilateral. By first inspection it looks like an irregular quadrilateral.
Construct a rectangular "container" such that the quadrilateral is inscribed into this container. Calculate the area of the rectangle and subtract the areas of the 4 right triangles:
Therefore