In other words, a square is a regular polygon with four sides. When used as a symbol, denotes a square geometric figure with given vertices, while is sometimes used to denote a graph product (Clark and Suen 2000). A square is a special case of an isosceles trapezoid, kite, parallelogram, quadrilateral, rectangle, rhombus, and trapezoid. eLElbHcvPA0B Square Reader is Payment Card Industry Data Security Standardpliant and Verisign certified. Square provides its magnetic stripe card readers to sellers without charge. Square charges $99 for Square Stand and $29 for its chip-based Square Reader. The Square app is freely downloadable from the Apple App Store and the Google Play Store. YhaV9yticl5h In Euclidean geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles. It can also be defined as a rectangle with two equal-length adjacent sides. It is the only regular polygon whose internal angle, central angle, and external angle are all equal, and whose diagonals are all equal in length. A square with vertices ABCD would be denoted ah1vGtUBBhBm
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