Shortest paths on and around shapes

The shortest route across the surface of a box is a straight line once you unfold the box flat. Around an obstacle, the shortest path hugs the corners. Both cases turn a curved or folded question into a straight-line one.

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Work through it

LearnWhat it is, how to spot it, a worked example, and where it goes wrong.
Practice — 3-point ladderNo problems written at this tier yet.Nothing written at this tier yet
Practice — 4-point ladderNo problems written at this tier yet.Nothing written at this tier yet
Practice — 5-point ladder1 problem. Three in a row finishes it.0/3 in a row · 0/1 solved
Skill quizFinish every ladder that has problems first.Finish the ladders above first

Before and after

Needs first

CFT-02Draw the diagram GEO-01Perimeter and area of rectilinear shapes GEO-10Nets and folding, 2D to 3D

Opens up

Nothing yet. No other skill in the Atlas lists this one as a prerequisite.

In official papers

No indexed official paper question has been tagged with GEO-17 yet. The index grows one paper at a time, and it records only question numbers, point values and our own skill tags — never the problems themselves.

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