Parallelogram Identification Using Vectors
This page focuses on using vector equations to identify parallelograms in 3D space. It presents a key concept for parallelogram identification:
Definition: A parallelogram is formed when AB = DE and AD = BC, where these are vectors between the parallelogram's vertices.
The page provides a detailed example (problem 10a) with the following steps:
- Given points: A(2,1,1), B, C(7,1,2), D(5,1,4)
- Calculate vectors AB, DE, AD, and BC
- Compare magnitudes of opposite sides
- Verify if conditions for a parallelogram are met
Example: AB = , DE = , AD = (3,0,3), BC = (3,0,3)
The solution demonstrates that the given points indeed form a parallelogram, as AB = DE and AD = BC in both direction and magnitude.










