
and a parallelogram ABCD are standing on the same base AB and between the same parallels AB, DC.

Complete the parallelogram ABPQ.

The area of a triangle is half that of a parallelogram standing on equal bases and between the same parallels.

Triangles on the same base and between the same parallels are equal.

and
are on the same base and between the same parallels AB, DQ.





and
are equal in area and are on the same base AB. PM and QN are altitudes.
PM = QN
Join PQ.


