Think of this as being a rectangle of 90ft across and 66ft high plus a
triangle which sticks out a further 60ft (150ft - 90ft) and is also
66ft high. The area is thus that of a rectangle (90 x 66) plus that of
a triangle (1/2 x base x perpendicular height, or 60 x 66 / 2).

Hope this helps, though I'm not sure what it has to do with Excel.

Pete

On Sep 3, 7:53*am, Mr. Rai <Mr. wrote:
How do I find area of a rectangle having two sides equal and two sides
different; for example a rectangle having sides as
1.) 90 ft. 2.) 150 ft. 3.) 66 ft. 4.) 66 ft.