Maths MCQ Class IX Ch-6 | Lines & Angles

  Mathematics

MCQ | Class 09 | Chapter 6
Lines and Angles

Multiple Choice Questions (MCQ)

• MCQ Based on the different types of angles.

• MCQ  Based on the concept of parallel lines.

• MCQ Based on the Lines and angles.

Features

• In the MCQ given below you find the important MCQ which are strictly according to the CBSE syllabus and are very useful for the CBSE Examinations. 
• Solution Hints are also given to some difficult problems. 
• Each MCQ contains four options from which one option is correct. 

Action Plan

• First of all students should Learn and write all basic points and Formulas related to the Chapter 6  Lines and Angles.
• Start solving  the NCERT Problems with examples.
• Solve the important assignments on the Chapter 6 Class XI.
• Then start solving the following MCQ.

MCQ | CHAPTER - 6 | CLASS IX
LINES AND ANGLES

Q1) A line with two end points is called
a) line
b) ray
c) line-segment
d) triangle

Answer c

Q2) How many end points does a ray have?
a) One
b) Two
c) Three
d) Four

Answer a

Q3) If x is an acute angle, then what is true for x?
a) x = 90°
b) 0° < x < 90°
c) 90° < x < 180°
d) 180° < x < 360°

Answer b

Q4) If x is a right angle, what is true for x?
a) x = 90°
b) 180° < x < 360°
c) 0° < x < 90°
d) 90° < x < 180°

Answer a

Q5) What is the angle formed by a line?
a) 90°
b) 180°
c) 270°
d) 360°

Answer b

Q6) If 180° < x < 360°, then x is a ______ angle.
a) acute
b) obtuse
c) reflex
d) right

Answer c

Q7 The sum of complimentary angles is
a) > 90°
b) < 90°
c) = 90°
d) = 180°

Answer c

Q8) The sum of two supplementary angles is 
a) > 90°
b) < 90°
c) = 90°
d) = 180°

Answer d

Q9) Find the value of x if line l || m ?

a) 90°                b) 83°                    c) 132°                    d) 41°

Answer d

Q10) In Figure AB || CD, the value of x is

(a) 35°                (b) 40°                (c) 60°                    (d) 75°

Ans: d

Q11) An acute angle is:

a) More than 90 degrees

b) Less than 90 degrees

c) Equal to 90 degrees

d) Equal to 180 degrees

Answer: b

Q12) A reflex angle is:

a) More than 90 degrees

b) Equal to 90 degrees

c) More than 180 degrees

d) Equal to 180 degrees

Answer: c

Q13) A straight angle is equal to:

a) 0°                b) 90°                    c) 180°                d) 360°

Answer: c

Q14) Two angles whose sum is equal to 180° are called:

a) Vertically opposite angles

b) Complementary angles

c) Adjacent angles

d) Supplementary angles

Answer: d

Q15) Intersecting lines cut each other at:

a) One point

b) Two points

c) Three points

d) Null

Answer: a

Explanation: Two lines always intersect each other at one point.

Q16) Two parallel lines intersect at:

a) One point

b) Two points

c) Three points

d) Null

Answer: d

Explanation: If two lines are parallel to each other, they don’t intersect each other.

Q17) If two lines intersect each other, then the vertically opposite angles are:

a) Equal

b) Unequal

c) Cannot be determined

d) None of the above

Answer: a

Explanation: If two lines intersect each other, then the angles formed at the point of intersection are vertically opposite angles and are equal.

Q18) If one of the angles of a triangle is 130°, then the angle between the bisectors of the other two angles can be 

a) 50°

b) 65°

c) 145°

d) 155°

Answer: d

Q19) If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2 : 3, then the greater of the two angles is:

a) 54°

b) 108°

c) 120°

d) 136°

Answer: b

Q20) If one angle of a triangle is equal to the sum of the other two angles, then the triangle is

a) a right triangle

b) an isosceles triangle

c) an equilateral triangle

(d) an obtuse triangle

Answer: a

Q21) The angles of a triangle are in the ratio 5 : 3: 7. The triangle is

a) a right triangle

b) an acute-angled triangle

c) an obtuse-angled triangle

d) an isosceles triangle

Answer: b 

Q22) Angles of a triangle are in the ratio 2: 4 : 3. The smallest angle of the triangle is

a) 20°

b) 40°

c) 60°

d) 80°

Answer: b 

Q23) An obtuse angle is 

a) Less than 90°

b) Greater than 90°

c) Equal to 90°

d) Equal to 180°

Answer: b 

Q24) An exterior angle of a triangle is 80° and the interior opposite angles are in the ratio 1 : 3, measure of interior opposite angles are
a) 30°, 90°
b) 40°, 120°
c) 20°, 60°
d) 30°, 60°

Answer c

Q25) The angle of a triangle are in the ratio 5 : 3 : 7, the triangle is
а) an acute-angled triangle
b) an obtuse angled triangle
c) an right angled triangle
d) an isosceles triangle.

Answer  a 

Q26) If one angle of triangle is equal to the sum of the other two, then the triangle is
a) an isosceles triangle
b) an obtuse-angled triangle
c) an equilateral triangle
d) a right triangle

Answer d

Q27) One of the angles of a triangle is 75°. If the difference of other two is 35°, then the largest angle of other two angles has a measure
a) 80°
b) 75°
c) 70°
d) 135°

Answer C

Q28) Each angle of an equilateral triangle is
a) 50°
b) 90°
c) 54°
d) 60°

Answer  d

Q29) In the given figure, if AOB is a straight line, then ∠BOC is

(a) 80°                (b) 70°                    (c) 60°                    (d) 20°

Answer a 

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