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A rhombus therefore has all of the properties of a parallelogram: for example, opposite sides are parallel; adjacent angles are supplementary; the two diagonals bisect one another; any line through the midpoint bisects the area; and the sum of the squares of the sides equals the sum of the squares of the diagonals (the parallelogram law).
Two pairs of opposite angles are equal in measure. The diagonals bisect each other. One pair of opposite sides is parallel and equal in length. Adjacent angles are supplementary. Each diagonal divides the quadrilateral into two congruent triangles. The sum of the squares of the sides equals the sum of the squares of the diagonals.
The corresponding angles as well as the corresponding sides are defined as appearing in the same sequence, so for example if in a polygon with the side sequence abcde and another with the corresponding side sequence vwxyz we have vertex angle a appearing between sides a and b then its corresponding vertex angle v must appear between sides v and w.
Rhomboid: a parallelogram in which adjacent sides are of unequal lengths, and some angles are oblique (equiv., having no right angles). Informally: "a pushed-over oblong". Not all references agree; some define a rhomboid as a parallelogram that is not a rhombus. [4] Rectangle: all four angles are right angles (equiangular). An equivalent ...
A square is a rhombus with a right angle between a pair of adjacent sides. [1] A square is a rhombus with all angles equal. [1] A square is a parallelogram with one right angle and two adjacent equal sides. [1] A square is a quadrilateral with four equal sides and four right angles; that is, it is a quadrilateral that is both a rhombus and a ...
A kite with three 108° angles and one 36° angle forms the convex hull of the lute of Pythagoras, a fractal made of nested pentagrams. [23] The four sides of this kite lie on four of the sides of a regular pentagon, with a golden triangle glued onto the fifth side. [17] Part of an aperiodic tiling with prototiles made from eight kites
From January 2008 to May 2009, if you bought shares in companies when Michael H. Sutton joined the board, and sold them when he left, you would have a -96.7 percent return on your investment, compared to a -38.2 percent return from the S&P 500.
For example, the (isogonal) rectangle and (isotoxal) rhombus are duals. In a cyclic polygon, ... Two pairs of equal adjacent angles Two pairs of equal adjacent sides