The sides and angles of a square: The sides of a square are all congruent (the same length.) The angles of a square are all congruent (the same size and measure.) Remember that a 90 degree angle is called a right angle.. So, a square has four right angles. Opposite angles of a square are congruent.
Read the Find the Right Treatment for Your Back Pain article > >. What they treat: Back pain is a common reason people seek out chiropractors, but these specialists treat pain from all kinds of conditions, injuries, and accidents -- even chronic headaches. They don't prescribe medicine, but they use hands-on techniques to offer relief.
If you see a specialist, make sure you have a supportive main doctor to help you. Often, your family doctor may help you coordinate care if you need to see one or more specialists. Here are some specialists who treat autoimmune diseases: Nephrologist. A doctor who treats kidney problems, such as inflamed kidneys caused by lupus.