Download App

Lines and Angles — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsLines and Angles1 Mark
MCQ
The complement of (90 - a)º is:
  • A
    (90 + 2a)º
  • B
    (90 - a)º
  • C
    aº
  • D
    -aº
✓

Answer

  1. aº
    Solution:
    We know that the sum of complementary angles are 90º
    Let the complementary angle of (90 - a)º be x
    x + (90 - a)º = 90º
    x = 90º - (90 - a)º
    x = 90º - 90º + aº
    x = aº.

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→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

The expression x4 + 4 can be factorized as:
→
If the point (3, 4) lies on the graph of 3y = ax + 6, then the value of 'a' is:
→
If $\sqrt{2}=1.4142$, then $\sqrt{\frac{\sqrt{2}-1}{\sqrt{2}+1}}$ is equal to
→
The consecutive sides of a quadrilateral have:
  1. No common point.
  2. One common point.
  3. Two common points.
  4. Infinitely many common points.
→
If $\overline{\text{AB}}=\overline{\text{PQ}}$ and $\overline{\text{PQ}}=\overline{\text{XY}},$ then:
→
P is any point on the side BC of a $\triangle\text{ABC}.$ P is joined to A. If D and E are the midpoints of the sides AB and AC respectively and M and N are the midpoints of BP and CP respectively then quadrilateral DENM is:
  1. A trapezium.
  2. A parallelogram.
  3. A rectangle.
  4. A rhombus.
→
The figure formed by joining the mid-points of the adjacent sides of a quadrilateral is a
→
In the given figure, lines AB and CD intersect at a point O. The sides CA and OB have been produced to E and repectively such that $\angle\text{OAE}=\text{x}^\circ$ and $\angle\text{DBF}=\text{y}^\circ.$

If $\angle\text{OCA}=80^\circ,\angle\text{COA}=40^\circ$ and $\angle\text{BDO}=70^\circ$ then $\text{x} ^\circ+\text{y}^\circ=?$
→
An exterior angle of the triangle is 110o, One of the opposite interior angle is 50º. What are the other two angles?
→
If $8=\text{t}^{\frac{2}{3}}+4\text{t}^{-\frac{1}{2}},$ What is the value of g when t = 64?
→