As shown in the figure, all quadrangles are squares, and all triangles are right triangles, Please find several figures in the figure so that the sum of their areas is exactly equal to the largest square area. Try to give more than two schemes
Scheme 1: S2 + S3 = S1
Scheme 2: S4 + S5 + S6 + S7 = S1
(Note: S1, S2, S3 S7 represents the area of the corresponding square respectively.)