homothecy
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Menelaus' theorem — Menelaus theorem, case 1: line DEF passes inside triangle ABC Menelaus theorem, named for Menelaus of Alexandria, is a theorem about triangles in plane geometry. Given a triangle ABC, and a transversal line that crosses BC, AC and AB at points D … Wikipedia
Affine geometry — is a form of geometry featuring the unique parallel line property (see the parallel postulate) but where the notion of angle is undefined and lengths cannot be compared in different directions (that is, Euclid s third and fourth postulates are… … Wikipedia
Homothetic transformation — In mathematics, a homothety (or homothecy or dilation) is a transformation of space which takes each line into a parallel line (in essence, a similarity that is similarly arranged). All dilatations form a group in either affine or Euclidean… … Wikipedia
Francis Lefebure — Dr. Francis Lefebure (September 17, 1916 – March 19, 1988) was a French physician, known for his study of phosphenes.Early lifeLefebure was born in Paris, France. His mother, Claire de Saint Rémy, was a famous painter and poet. His father, a… … Wikipedia
homothety — noun homothecy … Wiktionary
homothet — noun homothecy … Wiktionary
