Cross sections

Imagine slicing a cube or rectangular block. Choose the flat shape made by the cut.

Slanted cuts with up to five sides

Six questions. No time limit.

What shape does the slice make?

The transparent sheet is the cutting plane. Lines on the front faces show the cut; imagine how it continues behind them.

Example only. Start to get a new set.

How to play

The lines on the front faces show where the cutting plane meets the solid. Imagine the rest of the cut, then choose one of four flat shapes. Selecting a shape submits your answer immediately.

After answering, the actual section is highlighted inside the solid and shown face-on beside it. Turn view changes only the viewing direction. Choose Next question when ready.

A cutting plane makes a flat polygon where it meets a cube or rectangular block. Follow the faces it crosses; each contributes a side. The section can have three to six sides.

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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