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.
Different types of health professionals can help treat a thyroid problem. 1  Family medicine doctor or general practitioner. 2  Internist. 3  Pediatrician. 4  Nurse practitioner.