The answer is C. The square root of 83 is about 9.1. Because a square has four sides, you multiply 9.1 by 4 to get 36.4. The product rounds to the nearest whole number at 36.
To form a linear pair means that when added, they equal 180 degrees. but if they have equal measures....180/2 = 90...then they would both equal 90 degrees.....and 90 degrees is a right angle. So ABC and CBD are both right angles
