Question

How do you find the area of a 4-sided polygon?

Answer 1

There are formulae for the common quadrilaterals, else find the area of two triangles and add them together.

Explanation:

A 4-sided polygon is a quadrilateral. This is family of well-known shapes. Most of them have their own formula for area:

Trapezium: `A = ((a+b)xxh)/2`

Parallelogram/Rhombus: `A = bxx h`

Rectangle: `A = lxx b`

Kite/Rhombus/square: `A = (d_1 xx d_2)/2`

Square: `A = s xx s`

For any other quadrilateral, divide the shape into two triangles, find the area of each and add them together.