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  2. Rhombus - Wikipedia

    en.wikipedia.org/wiki/Rhombus

    A rhombus has all sides equal, while a rectangle has all angles equal. A rhombus has opposite angles equal, while a rectangle has opposite sides equal. A rhombus has an inscribed circle, while a rectangle has a circumcircle. A rhombus has an axis of symmetry through each pair of opposite vertex angles, while a rectangle has an axis of symmetry ...

  3. Quadrilateral - Wikipedia

    en.wikipedia.org/wiki/Quadrilateral

    A quadrilateral is a square if and only if it is both a rhombus and a rectangle (i.e., four equal sides and four equal angles). Oblong: longer than wide, or wider than long (i.e., a rectangle that is not a square). [5] Kite: two pairs of adjacent sides are of equal length.

  4. Dynamic rectangle - Wikipedia

    en.wikipedia.org/wiki/Dynamic_rectangle

    A root-phi rectangle divides into a pair of Kepler triangles (right triangles with edge lengths in geometric progression). The rootrectangle is a dynamic rectangle but not a root rectangle. Its diagonal equals φ times the length of the shorter side. If a rootrectangle is divided by a diagonal, the result is two congruent Kepler triangles.

  5. Parallelogram - Wikipedia

    en.wikipedia.org/wiki/Parallelogram

    A parallelogram has rotational symmetry of order 2 (through 180°) (or order 4 if a square). If it also has exactly two lines of reflectional symmetry then it must be a rhombus or an oblong (a non-square rectangle). If it has four lines of reflectional symmetry, it is a square.

  6. Rectangle - Wikipedia

    en.wikipedia.org/wiki/Rectangle

    In Euclidean plane geometry, a rectangle is a rectilinear convex polygon or a quadrilateral with four right angles. It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°); or a parallelogram containing a right angle. A rectangle with four sides of equal length is a square.

  7. Parallelogon - Wikipedia

    en.wikipedia.org/wiki/Parallelogon

    Dih 2, order 4 Square: Dih 4, order 8 6 Elongated parallelogram: Z 2, order 2 Elongated rhombus: ... p4m (*442) Rhombus cmm (2*22) Rectangle pmm (*2222) Parallelogram

  8. Square - Wikipedia

    en.wikipedia.org/wiki/Square

    A square is a special case of a rhombus (equal sides, opposite equal angles), a kite (two pairs of adjacent equal sides), a trapezoid (one pair of opposite sides parallel), a parallelogram (all opposite sides parallel), a quadrilateral or tetragon (four-sided polygon), and a rectangle (opposite sides equal, right-angles), and therefore has all ...

  9. Rhombic - Wikipedia

    en.wikipedia.org/wiki/Rhombic

    Rhombic may refer to: . Rhombus, a quadrilateral whose four sides all have the same length (often called a diamond); Rhombic antenna, a broadband directional antenna most commonly used on shortwave frequencies