Square (geometry)
From Wikipedia, the free encyclopedia.
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 links
- Triangle 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"
