Given that , and the area of , find the area of .
Step 1: Find the area of .
Triangles with congruent bases on one straight line that have a common vertex are equal in area.
and and share a common vertex at . Therefore,
Step 2: Find the area of .
If two triangles share the same base and their vertices lie on a straight line parallel to the base, then the triangles are equal in area.
and share the common base , and their vertices lie along which is parallel to the base. Therefore,