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Question:
The measure of an angle is three times the measure of its complement. Then find the angles.
Solution:
Note:
- Two angles are said to be complementary angles if their sum is equal to 90°.
- Two angles are said to be supplementary angles if their sum is equal to 180°.
Now,
Let the angle be x
then its complementary angle will be
(90° - x).
Now;
According to question the angle is three times the measure of its complement.
ie;
=> x = 3(90° - x)
=> x = 270° - 3x
=> x + 3x = 270°
=> 4x = 270°
=> x = 270°/4
=> x = 67.5°
Hence,
The angle is 67.5°
Also,
The complementary of the angle is
(90°- 67.5°) ie; 22.5°
Hence;
The required pair of angles is ;
22.5° and 67.5°
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