What is another word for parallelogram rule?
Pronunciation: [pˌaɹəlˈɛləɡɹˌam ɹˈuːl] (IPA) 
The parallelogram rule is a concept used in mathematics to add two vectors that are not parallel. It is also known as the parallelogram addition rule, triangle law, or vector addition rule. The rule states that the sum of two vectors can be found by constructing a parallelogram where the vectors represent two adjacent sides. The diagonal of the parallelogram then represents the sum of the two vectors. This concept is used extensively in physics and engineering to calculate forces and motions. Other common synonyms for the parallelogram rule include vector sum rule, resultant vector rule, and graphical addition of vectors.
