The difference of two complementary angles is 40°.
2017
The difference of two complementary angles is 40°.
- A.
65°, 35°
- B.
70°, 30°
- C.
25°, 65°
- D.
70°, 110°
Attempted by 19 students.
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Correct answer: C
Complementary angles sum to 90°.
Let the angles be x and y.
We have x + y = 90° and x - y = 40°.
Adding the equations gives 2x = 130°, so x = 65°.
Then y = 90° - 65° = 25°.
The angles are 65° and 25°.