The content is interactive and helps in learning about area of a square and adding variables. It consists of two levels: Level 1. Prove the identity (a + b)2 = a2 + b2 + 2ab  using area model.
Level 2. Prove the identity (a - b)2 = a2 + b2 - 2ab  using area model.

License:[Source Dragonlearn ]April 8, 2020, 12:40 p.m.