Download App

Lines and Angles — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSLines and Angles1 Mark
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.

Start Generating Free

Explore more

More "M.C.Q. [1 Marks Each]" from Lines and Angles→Lines and Angles — all question types→MATHS STD 7 question papers→Gujarat Board STD 7 question papers→Gujarat Board question paper generator→

Similar questions

Mark $(\checkmark)$ against the correct answer in the following:
At simple interest a sum becomes $\frac{49}{40}$ of it self in $\frac12$ years. The rate of interest per annum is:
→
At what rate per cent per annum simple interest will a sum double itself in 10 years?
→
In what time will a sum of $Rs. 8000$ amount to $Rs. 8360$ at $6\%$ per annum simple interest?
→
Which of the following fractions lies between $\frac{2}{3}$ and $\frac{5}{7}$ ?
→
Mark $(\checkmark)$ against the correct answer in the following: $\frac{-102}{119}$ in standard form is:
→
The area of a circle of circumference $C$ is
→
The number of edges of a triangular pyramid is _______.
→
An angle is thrice its supplement. The measure of the angle is
→
Mark against the correct answer in the following:
If $16$ men can reap a field in $30$ days, in how many days will $20$ men reap the same field?
→
Mark $(\checkmark)$ against the correct answer in the following: $\frac{-3}{8}\div=0?$
→