You need to know the angles too. And then you have to apply some trigonometry: So there you go: the area of a parallelogram is a · b · sin α. Greek letters! Blecch. So sure, respect the ...

The base and the perpendicular height are at right angles. One side of the parallelogram is the base. The base does not have to be the bottom side. The perpendicular height is not a side.

Take any quadrilateral such as ABCD above. Construct the midpoints of each side and join them to form another quadrilateral EFGH. Varignon's Theorem asserts that the ...

SSC Exam, Railway and Other Exam. Here are some important properties of Parallelograms, Triangles and Circles ...