Determine if each of the following statements is always true, sometimes true or never true.
A. The sum of the measures of two supplementary angles is 180°.
B. The sum of complimentary angles is 180°.
C. Two adjacent angles are complementary.
A. Always true. Supplementary angles are defined as two angles whose measures add up to 180°.
B. Never true. Complementary angles are defined as two angles whose measures add up to 90°, not 180°.
C. Sometimes true. Two adjacent angles can be complementary, but they don't have to be. It depends on the measures of the angles in question.