https://cdn.kastatic.org/ka-perseus-graphie/3a1c2a3379abca2dfdc6c6e257f3ca36dcdcca9c.svg is 1 unit square. https://cdn.kastatic.org/ka-perseus-graphie/141b410a61c213c8eefbf10b1cd70c5c5c3278d2.svg Which expressions can we use to find the area of the rectangle?