As shown in the figure, quadrilateral ABCD and quadrilateral aefc are two rectangles, and point B is on the edge of EF. If the area of rectangle ABCD and rectangle aefc is S1 and S2 respectively, what is the size relationship?
S1=S2
The diagonal AC divides the rectangle ABCD into two congruent triangles
∴S△ABC=½S1
∵△ ABC is the same height as rectangular aefc
∴S△ABC=½S2
∴S1=S2