What is parralogram?
Answers
In Euclidean geometry, a parallelogram is a simple (non-self-intersecting) quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. The congruence of opposite sides and opposite angles is a direct consequence of the Euclidean parallel postulate and neither condition can be proven without appealing to the Euclidean parallel postulate or one of its equivalent formulations.
This parallelogram is a rhomboid as it has no right angles and unequal sides.
Type
quadrilateral
Edges and vertices 4
Symmetry group
C2, [2]+, (22)
Area =b × h (base × height);
ab sin θ (product of adjacent sides and sine of any vertex angle)
By comparison, a quadrilateral with just one pair of parallel sides is a trapezoid in American English or a trapezium in British English.
The three-dimensional counterpart of a parallelogram is a parallelepiped.
The etymology (in Greek παραλληλ-όγραμμον, a shape "of parallel lines") reflects the definition.
Answer:
a parallelogram is a quadrilateral or a simple close figre whose opposite sides are equal and opposite angles are also equal .