parallelogram

موضوع: parallelogram الخميس أكتوبر 22, 2009 8:33 pm

In geometry, a parallelogram is a quadrilateral with two sets of parallel sides. The opposite or facing sides of a parallelogram are of equal length, and the opposite angles of a parallelogram are equal.
Opposite sides are parallel and congruent.

Properties
Opposite sides of a parallelogram are equal in length
Opposite angles of a parallelogram are equal in measure
The area, A, of a parallelogram is A = bh, where b is the base of the parallelogram and h is its height
Opposite sides of a parallelogram will never intersect
The area of a parallelogram is twice the area of a triangle created by one of its diagonals.
The diagonals of a parallelogram bisect each other.

موضوع: رد: parallelogram الأحد نوفمبر 29, 2009 1:16 pm

thanks Shara
great topic