CreaseForge

One idea folds all of origami into maths

Every fold is a reflection across the crease. Whatever sits on one side of the fold lands as its exact mirror image on the other — so where a corner goes isn’t a guess, it’s a reflection you can compute.

↔️ Fold across a line. A dot 3 units left of the crease lands 3 units to the right. Left/right, top/bottom, or the diagonal — the crease is always the mirror.
📐 Fold an angle in half. Match one edge onto the other and the crease bisects the angle exactly — halfway between 20° and 80° is 50°, no protractor needed.
🔷 Count the symmetry. A square lands on itself along 4 folds, a triangle 3, a hexagon 6 — a regular shape has as many symmetry folds as it has sides.

Everything runs on your device — no internet, no accounts.

The rooms

🔮 Folding console — predict where a fold lands, then mirror a point yourself.
🎯 Bring this to that — point onto point, edge onto edge: guess how many folds do it.
🕊️ Fold a crane — squash, petal and reverse folds, from the square to the bird.
📜 CraneQuest — one bird, three stories: what is on the record, and where sources disagree.
⬡ The flexagon — a strip with a hidden face: which one comes next?
📄 Seven folds? — how thick does paper get, and how far can you go?

Meet the crew — the folds that make a mirror

Mira is the crease itself — a line of reflection that flips one half of the paper onto the other.
Valley and Mountain are the two ways to fold, but both are the same mirror seen from opposite sides.
Axis (mentor) counts a shape’s symmetry folds and reminds the crew a regular n-gon always has exactly n.
Bisect matches one edge onto another to split an angle exactly in half — geometry a ruler can only approximate.

From our friends at Fold Commons

Paper has one path to its shape: you choose every crease. A protein folds itself, into the one shape its chain of parts finds. FoldLens Junior lets you look at predicted 3D protein shapes from the AlphaFold Database, right in the browser.

Same topic Ages 9–14

FoldLens Junior

The K-12 (ages 9–14) sibling of FoldLens: the same AlphaFold Database content in a tier-appropriate voice, NGSS-aligned, COPPA-safe by design. Pick a protein and see its real 3D shape in the browser.

opens foldcommons.org · in English

What next? Pick a door

Chosen from what this app is about. What you open is remembered on this device only.

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