In metric terms a square foot is a square with sides 0.3048 metres in length. One square foot is the equivalent to 0.09290304 square metres. The six floors of the White House (Washington D.C., U.S.A.) have a combined floor-space area of approximately 55,000 square feet.
A cactus (plural: cacti, cactuses, or cactus) is a member of the plant family Cactaceae within the order Caryophyllales.The word cactus derives, through Latin, from the Ancient Greek ÎºÎ¬ÎºÏÎ¿Ï, kaktos, a name originally used by Theophrastus for a spiny plant whose identity is not certain.Cacti occur in a wide range of shapes and sizes. Most cacti live in habitats subject to at least some drought.actus stems are often ribbed or fluted, which allows them to expand and contract easily for quick water absorption after rain, followed by long drought periods. Like other succulent plants, most cacti employ a special mechanism called  crassulacean acid metabolism  (CAM) as part of photosynthesis.
State Bird: Cactus Wren. Cactus wrens eat insects, seeds, and fruit. They often build their nests inside a cactus to protect them from predators. State Flower: Blossom of the Saguaro Cactus. The pure white waxy blossom of the giant saguaro cactus was designated the state flower of Arizona in 1931. It blooms on the tips of the saguaro cactus during the May and June months. State Mammal: Ringtail. Ringtails are cat-sized carnivores resembling a small fox with a long raccoon-like tail.