MCQ
The measure of an angle which is its own complement is:
- A$30^\circ$
- B$60^\circ$
- C$90^\circ$
- ✓$45^\circ$
✓
Answer
Correct option: D.
$45^\circ$
Let the required angle be $x$
Now, complementary of the required angle $= 90^\circ - x$
Then,
$x = 90^\circ - x$
$\Rightarrow x = 90^\circ - x$
$\Rightarrow 2x = 90^\circ $
$\Rightarrow x = 45^\circ $
Hence, the correct answer is option $(d).$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Mark $(\checkmark)$ against the correct answer.
In $\triangle\text{ABC},\angle\text{B}=90^\circ,$ AB = 5cm and AC = 13cm. Then, BC =?
→In $\triangle\text{ABC},\angle\text{B}=90^\circ,$ AB = 5cm and AC = 13cm. Then, BC =?
The length of a room is $15m$. The cost of carpeting it with a carpet $75\ cm$ wide at $Rs .50$ per metre is $Rs .6000$. The width of the room is:
→Mark $(\checkmark)$ against the correct answer: The supplement of $35^\circ $ is:
→If $\frac{\text{a}}{2}=\frac{\text{b}}{3}=\frac{\text{c}}{4},$ then $\text{a}:\text{b}:\text{c}=$
→Mark $(\checkmark)$ against the correct answer in the following: In what time will $Rs. 6000$ amount to $Rs. 6360$ at $8\%$ interest per annum simple interest?
→The length and breadth of a rectangular field are in the ratio $5: 3$ and its perimeter is $480 m.$ The area of the field is:
→Mark $(\checkmark)$ against the correct answer in the following:
The reciprocal of $2\frac{1}{3}$
→The reciprocal of $2\frac{1}{3}$
What least number is to be subtracted from each term of the ratio $15 : 19$ to make the ratio $3 : 4?$
→Each side of an equilateral triangle is $8\ cm$ long. Its area is:
→Mark $(\checkmark)$ against the correct answer:
$\triangle\text{ABC},$ is an isosceles right triangle in which $\angle\text{A}=90^\circ$ and BC = 6cm. Then AB = ?
→$\triangle\text{ABC},$ is an isosceles right triangle in which $\angle\text{A}=90^\circ$ and BC = 6cm. Then AB = ?