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Every idea has
a way in.

Explore mathematics, algorithms, and computer science through clear visual explanations. See what changes at each step, and understand why the result makes sense.

Change the shape.
Keep the area.

Slide the top of a square sideways. Its base and height stay the same, so its area does too. This transformation is a shear, with a determinant of 1.

Horizontal shear: (x, y) becomes (x + s·y, y). The starting square has side length 1.
Explore determinants and area · MIT

A shear preserves areaA unit square is sheared sideways. Its area remains one square unit.11Same base. Same height.
0.50
Area after transformation1 square unit

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Why 23 People Make a Birthday Match Likely

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How Hash Tables Find Data So Quickly

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How Dijkstra Finds the Shortest Path

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How Huffman Coding Makes Files Smaller

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When Greedy Fails: The Logic of Dynamic Programming

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