age pyramid or diagram
1Pyramid — This article is about pyramid shaped structures. For the geometric term, see Pyramid (geometry). For other uses, see Pyramid (disambiguation). The Egyptian pyramids of the Giza Necropolis, as seen from above …
2Population pyramid — This distribution is named for the frequently pyramidal shape of its graph. A population pyramid, also called an age structure diagram, is a graphical illustration that shows the distribution of various age groups in a population (typically that… …
3population pyramid — A diagram that illustrates the distribution of a population by age. The youngest and most numerous age group forms a rectangle at the base of the pyramid; the oldest and least numerous is a small rectangle at its apex …
4population pyramid — /pɒpjəˈleɪʃən pɪrəmɪd/ (say popyuh layshuhn piruhmid) noun a diagram showing the age and sex distribution, and sometimes other features, of a particular population, usually in the form of a horizontal bar graph, the bars representing age… …
5Golden ratio — For the Ace of Base album, see The Golden Ratio (album). Not to be confused with Golden number. The golden section is a line segment divided according to the golden ratio: The total length a + b is to the length of the longer segment a as the… …
6Demographic transition — A diagram of the demographic transition model, including stage 5 The demographic transition model (DT) is the transition from high birth and death rates to low birth and death rates as a country develops from a pre industrial to an industrialized …
7History of mathematics — A proof from Euclid s Elements, widely considered the most influential textbook of all time.[1] …
8HSL and HSV — Fig. 1. HSL (a–d) and HSV (e–h). Above (a, e): cut away 3D models of each. Below: two dimensional plots showing two of a model’s three parameters at once, holding the other constant: cylindrical shells (b, f) of constant saturation, in this case… …
9Charles Piazzi Smyth — Born 3 January 181 …
10mathematics — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… …
