A) If the area of a rectangle is 36, then the length is 12 and the width is 3. Counterexample: length
I width
-) If 21 and 22 are complementary angles, then one of them must have a
measure less than 45
Counterexample: m 21 = D, m 22 = 0
If the length of AC is 20 and point B lies on AC, then AB - 10 and BC - 10.
Counterexample: AB - .BC -
If the measures of ZR, ZS, and T sum to 180°, then one of the angles must
be obtuse.
Counterexample: m ZR - ), m ZS - I'm T -