Three squares in a row each have one diagonal drawn, all slanting the same way. How many parallelograms (rectangles and squares included) are in the figure?

Question

Accepted Answer

9. Rectangles: 3 single squares, 2 pairs and the whole strip, 6. The three diagonals are parallel, so any two of them with the top and bottom edges make a slanted parallelogram: 32 = 3 . Total 6 + 3 = 9 .

Three squares in a row each have one diagonal drawn, all slanting the same way. How many parallelograms (rectangles and squares included) are in the figure?

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