Shape assembly

Study the pieces. Choose the shape they can make together.

Combine three pieces

Six questions. No time limit.

Which shape can these pieces make?

Use every piece once. You may turn pieces, but not flip or overlap them.

Example only. Start to get six puzzles.

How to play

Study two, three, or four numbered pieces. Choose the one outline they can fill. Use every piece once; turning is allowed, flipping and overlapping are not.

Your answer locks when selected. The correct assembly appears with the same piece numbers and colors. Compare the boundaries, then choose Next question when ready.

All four outlines have the same area. Compare corners and edges, not just size. Pieces shown together use the same scale; the answer drawings are resized to fit their spaces.

Finish all six questions to save a result on this browser. Leaving early saves no completed round. Active time counts only while this page is in the foreground; there is no time limit or speed bonus.

Use Tab and Enter or Space to select a shape. Keys 1–4 also select shapes while answering, except when another control is focused. This is a visual practice; the figures require sight.

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