For a trapezoid, the following formula relates the area a, the two bases a and b, and the height h.
a=(a+b)2h
solve for a.
a. a=2a−bh
b. a=2ah+b
c. a=2ah−b
d. a=ah2−b

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m