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Puzzle #20: The Simpsons M

Add three straight lines to the diagram to create nine non-overlapping triangles.

Graphic: Jack Murtagh
Graphic: Jack Murtagh

The triangles may share sides, but shouldn’t share interior space. For example, the left-hand figure below depicts two triangles, whereas the right-hand figure only counts as one triangle, because the larger triangle overlaps with the smaller one.

Graphic: Jack Murtagh
Graphic: Jack Murtagh

Find the solution at the bottom of this page.