User:Atcovi/Geometry3


 * See also User:Atcovi/Geometry2

Parallelograms
A four-sided polygon with 2 sets of parallel lines.

Quadrilateral: Four-sided figure - includes Trapezoid (1 set of parallel lines) and Kite.

Need TO Know

 * OPPOSITE ANGLES OF A PARALLELOGRAM ARE CONGRUENT
 * SAME-SIDED ANGLES ARE SUPPLEMENTARY=180
 * DIAGONALS BISECT EACH OTHER -- ONLY IN SQUARES AND RECTANGLES.
 * TOP LEFT AND BOTTOM RIGHT: 80
 * BOTTOM LEFT AND TOP RIGHT: 100