tangent to tangent height
11Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… …
12Pappus chain — In geometry, the Pappus chain was created by Pappus of Alexandria in the 3rd century AD.ConstructionThe arbelos is defined by two circles, C U and C V, which are tangent at the point A and where C U is enclosed by C V. Let the radii of these two… …
13Partial derivative — In mathematics, a partial derivative of a function of several variables is its derivative with respect to one of those variables with the others held constant (as opposed to the total derivative, in which all variables are allowed to vary).… …
14Iron sight — Sight picture through iron sights of an H K MP5 submachine gun. The annular shroud around the front post sight is aligned with the rear peep sight to ensure the weapon is properly trained. Iron sights are a system of shaped alignment markers… …
15physical science, principles of — Introduction the procedures and concepts employed by those who study the inorganic world. physical science, like all the natural sciences, is concerned with describing and relating to one another those experiences of the surrounding… …
16Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole …
17Circle — This article is about the shape and mathematical concept. For other uses, see Circle (disambiguation). Circle illustration showing a radius, a diameter, the centre and the circumference …
18Stairway — Stairs redirects here. For other uses, see Stairs (disambiguation). Staircase redirects here. For other uses, see Staircase (disambiguation). This article is about the construction. For the song by Led Zeppelin, see Stairway to Heaven. Stairways… …
19Geodetic system — For other uses, see Geodetic. Geodesy Fundamentals …
20Law of cosines — This article is about the law of cosines in Euclidean geometry. For the cosine law of optics, see Lambert s cosine law. Figure 1 – A triangle. The angles α, β, and γ are respectively opposite the sides a, b, and c …
