help
Three concrete models are shown. Each model represents an algebraic expression. In each of the given algebraic expressions, n represents the figure number. Match each model with the algebraic expression it best represents.
![helpThree concrete models are shown Each model represents an algebraic expression In each of the given algebraic expressions n represents the figure number Matc class=](https://us-static.z-dn.net/files/d03/fe707c01307cf3d182ef183096deb33c.jpg)