Download App

Lines and Angles — MATHS STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9MATHSLines and Angles1 Mark
✓

Answer

  1. 30°
    Solution:

    From figure, we can see
    $\angle\text{x}^\circ=\angle\text{y}^\circ$ [Vertically opposite angles]
    Also,
    $\angle\text{3}\text{x}^\circ+\angle\text{y}^\circ+\angle2\text{x}^\circ=180^\circ$
    Now,
    $\angle\text{x}^\circ=\angle\text{y}^\circ$
    $\therefore\ \angle\text{3}\text{y}^\circ+\angle\text{y}^\circ+\angle2\text{y}^\circ=180^\circ$
    $\Rightarrow\ \angle6\text{y}^\circ=180^\circ$
    $\Rightarrow\ \angle\text{y}^\circ=180^\circ$

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" from Lines and Angles→Lines and Angles — all question types→MATHS STD 9 question papers→Rajasthan Board STD 9 question papers→Rajasthan Board question paper generator→

Similar questions

Simplified value of $(25)^{\frac{1}{3}}\times5^{\frac{1}{3}}$ is:
  1. 25
  2. 3
  3. 1
  4. 5
→
In the given figure, AOB is a diameter of a circle and CD || AB. If $\angle\text{BAD}=30^\circ$ then $\angle\text{CAD}=?$
→
If $\sqrt2=1.414,$ then the value of $\sqrt6-\sqrt3$ upto three place of decimal is :
→
Write the correct answer in the following:
The diagonals AC and BD of a parallelogram ABCD intersect each other at the point O. If $\angle\text{DAC}=32^\circ$ and $\angle\text{AOC}=70^\circ,$ then $\angle\text{DBC}$ is equal to:
  1. 24º
  2. 86º
  3. 38º
  4. 32º
→
A conical pandal 240m in radius and 100m high is made of cloth which is $100\pi$ wide. Then, the length of cloth used to make the pandal is:
→
The value of $\frac{(0.013)^3+(0.007)^3}{(0.013)^2-0.013\times0.007+(0.007)^2},$ is:
→
A solid metal ball of radius 8cm is melted and cast into smaller balls, each of radius 2cm. The number of such balls is:
  1. 8
  2. 16
  3. 32
  4. 64
→
If APB and CQD are 2 parallel lines, then the bisectors of the angles APQ, BPQ, CQP and PQD form, square only if:
→
The circumference of the base of a right circular cylinder is $44\ cm$. If its whole surface area is $968\ cm^2$ then the sum of its height and radius is:
→
Write the correct answer in the following:
A grouped frequency table with class intervals of equal sizes using 250-270 (270 not included in this interval) as one of the class interval is constructed for the following data:
268, 220, 368, 258, 242, 310, 272, 342, 310, 290, 300, 320, 319, 304, 402, 318, 406, 292, 354, 278, 210, 240, 330, 316, 406, 215, 258, 236.
The frequency of the class 310-330 is:
  1. 4
  2. 5
  3. 6
  4. 7
→