Square (geometry)
In plane geometry, a square is a polygon with four equal sides and equal angles. Those angles are then necessarily right angles. Squares are regular quadrilateralss, rectangles, rhombi, kitess, parallelograms, and isosceles trapezoids/isosceles trapezia. The diagonals of a square are equal and
conversely, if the diagonals of a rhombus are proven
to be equal, then that rhombus must be a square. The coordinates for the vertices of a square centered at the origin and with side length 2 are (±1, ±1), while the interior of the same consists of all points (x0, x1) with -1 < xi < 1.
External linksTriangle with two squares by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Triangle with two squares I by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Triangle with two squares II by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Triangle with three squares III by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Triangle with two squares IV Finsler-Hadwiger Theorem by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Triangle with two squares V Median and Altitude by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Triangle with four squares VI by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Van Aubel's theorem Quadrilateral with four squares by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"Parallelogram with five squares by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"
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