Area of a parallelogram using vectors.

Description
Application of vector rules to find the are of a polygon is explained. In this case first the polygon should be divided into number of triangles as possible and then area of these triangles would be calculated and added. Use of the determinant of vectors to find the area of a parallelogram and a triangle is described in this video lecture.
Prof. Denis Auroux, Maths, 18.02, Multivariable Calculus, Fall 2010: 5: Area and Determinants in 2D: Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (AccessedNovember1, 2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc