https://cdn.kastatic.org/ka-perseus-graphie/42c6fe5b47f30e29c37a11d0e138167765042175.svg is 1 unit square. https://cdn.kastatic.org/ka-perseus-graphie/736653cd974e8581b7c6d56611d047851c4711dc.svg Which expressions can we use to find the area of the rectangle?