MCQ
If an angle is its own complementary angle, then its measure is _________.
- A$30^\circ $
- ✓$45^\circ $
- C$60^\circ $
- D$90^\circ $
✓
Answer
Correct option: B.
$45^\circ $
Let the angle be $X$ It is given that $X$ is its own complementary angle.
$\Rightarrow X + X = 90^\circ $
$\Rightarrow 2X = 90^\circ $
$\Rightarrow X = 45^\circ $
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