The Custom Shape Tool in Photoshop has some shapes that can be used to create patterns. these patterns can be used to make decorations for artwork, decorations for mockups of packages and clothing, ...

These reflected rectangles are example of congruent shapes. When transforming a shape, either through translation, reflection or rotation, a congruent shape is produced. Enlargements create shapes ...

New work on the problem of “scissors congruence” explains when it’s possible to slice up one shape and reassemble it as another. If you have two flat paper shapes and a pair of scissors, can you cut ...