Complementary angles are two angles that add up to 90 degrees. To determine which pairs of angles are complementary from the given measures (17°, 34°, 90°, 120°, and 73°), we can calculate the sums of each possible pair:
- \( 17° + 73° = 90° \)
- \( 73° + 34° = 107° \) (not complementary)
- \( 120° + 17° = 137° \) (not complementary)
- \( 120° + 90° = 210° \) (not complementary)
The only pair that sums to 90° is \( 17° \) and \( 73° \).
Thus, the angles that correspond to complementary angles are 17° and 73°.