The document describes 4 squares - A, B, C, and D. 1/4 of squares A, B, and C are shaded, with the unshaded portions divided into equal parts: square A into 2 parts, square B into 3 parts, and square C into 4 parts. Square D is divided into 7 equal parts. The solution involves dividing the squares into parts and is not in the form of triangles.