9th Standard CBSE Syllabus & Materials
9th Standard CBSE
CBSE 9th Science Is matter around us pure? - New Model Questions Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Science Matter in our surroundings - New Model Questions Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Mathematics Heron's Formula Sample Question Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Mathematics Circles Sample Question Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Mathematics Quadrilaterals Sample Question Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Mathematics Triangles Sample Question Papers Study Material - QB365 Set A
Published on: 28/08/2019
Lines and Angles
Download CBSE Class 9th Standard CBSE Mathematics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 9th Standard CBSE Mathematics
Questions + Answers key
Take MCQ Mathematics Test
1.
The sum of two supplementary angles is
\(90^{ 0 }\)
\(180^{ 0 }\)
\(360^{ 0 }\)
None of these
2.
The angles whose sum is \(180^{ 0 }\) are called
supplementary angles
complementary angles
alternate angles
corresponding angles
3.
The sum of two complimentary angles is
\(180^{ 0 }\)
\(360^{ 0 }\)
\(90^{ 0 }\)
None of these
4.
In how many points two intersecting lines intersect?
4
3
2
1
5.
The minimum number of points required to draw a line is
1
2
3
4
6.
In \(\triangle ABC,\angle A=\angle B/2=\angle C/6,\) then what will be the measurement of \(\angle A?\)
7.
In the figure below, if x,y and z are exterior angles of \(\triangle ABC\), then calculate the value of x+y+z.
8.
In the given fig., AB and CD are parallel to each other, then calculate the value of x/
9.
Write the angle which is one-fifth of its complement.
10.
In the figure below, AOB is a straight line. Calculate the measure of \(\angle COD\).
1.
(b)
\(180^{ 0 }\)
2.
Definition of complementary angles
3.
Definition of complementary angles
4.
(d)
1
5.
(b)
2
6.
( )
In \(\triangle ABC,\)
\(\angle A+\angle B+\angle C=180^o\)(By given conditions)
\(\Rightarrow \angle A+2\angle A+6\angle A=180^o\)
\(\Rightarrow 9\angle A=180^o\)
\(\Rightarrow \angle A=20^o\)
7.
( )
Since sum of all the exterior angles formed by producing the sides of a polygon is 360o
xo+yo+zo=360o
8.
( )
Let, l||AB||CD (by construction)
then, \(\angle OEF+\angle BOE=180^o\)
\(\angle O'EF+\angle DOE=180^o\)[Corresponding interior angles]
\(\angle OEF+\angle O'EF+120^o+140^o\)
=360o
\(\Rightarrow \angle OEO'=360^o-260^o\)
x=100o
9.
( )
Let the angle be x, then
By given condition, \(x=\frac{1}{5}(90^o-x)\Rightarrow6x=90^0\)
\(\Rightarrow x=15^0\)
10.
( )
\(\because\) x+20o+2x-20o+60o=180o (\(\because\) Straight line makes an angle of 180o)
\(\Rightarrow\) 3x=180o-60o=120o
\(\Rightarrow\) x=40o
Thus, \(\angle COD\)=2x-20o=80o-20o=60o
9th Standard CBSE Syllabus & Materials
9th Standard CBSE
CBSE 9th Mathematics Lines and Angles Sample Question Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Mathematics Introduction to Euclid's Geometry Sample Question Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Mathematics Linear Equations in Two Variables Sample Question Papers Study Material - QB365 Set A
NEW9th Standard CBSE
CBSE 9th Mathematics Coordinate Geometry Sample Question Papers Study Material - QB365 Set A
CBSE 9th Standard CBSE Subjects
CBSE Standards
