https://cdn.kastatic.org/ka-perseus-graphie/9b017b5ef13c6c1be3ece58358f0e246879bbac3.svg is 1 unit square. https://cdn.kastatic.org/ka-perseus-graphie/a377e88ddf0bbddfa956f07c4b25e56f2c7b48c0.svg What is the area of rectangle A?