of geometric similarity already appears in human children, as can be seen in their drawings. See also Congruence (geometry) Hamming distance (string or sequence similarity) Helmert transformation Inversive geometry Jaccard index Proportionality Basic proportionality theorem Semantic similarity Similarity search Similarity (philosophy) Similarity space on numerical taxonomy Homoeoid (shell of concentric, similar ellipsoids) Solution of triangles Notes References Further reading Coxeter, H. S. M. (1969) [1961]. "§5 Similarity in the Euclidean Plane". pp. 67–76. "§7 Isometry and Similarity in Euclidean Space". pp. 96–104. Introduction to Geometry. John Wiley & Sons. External links Animated demonstration of similar triangles Geometry Equivalence (mathematics) Euclidean geometry Triangle geometry