Which rectangle has the greatest area? https://cdn.kastatic.org/ka-perseus-graphie/840582b84adcad7d5b4322fa4a3cf80b96075c48.svg https://cdn.kastatic.org/ka-perseus-graphie/75c33c70b6544b4caf3817bb9dbf51303abf4a9b.svg How do we know which rectangle has the greatest area?