(i) 140°, 40°
Sum of angles = 140° + 40° = 180°
∴ These are supplementary angles.
(ii) 170°, 10°
Sum of angles = 170° + 10° = 180°
∴ These are supplementary angles.
(iii) 75°, 15°
Sum of angles = 75° + 15° = 90°
∴ These are complementary angles.
(iv) 33°, 57°
Sum of angles = 33° + 57° = 90°
∴ These are complementary angles.
(v) 115°, 65°
Sum of angles = 115° + 65° – 180°
∴ These are supplemental angles.
(vi) 25°, 65°
Sum of angles = 25° + 65° = 90°
∴ It is complementary angles.