# MCQ Questions for Class 9 Maths Chapter 6 Lines and Angles with Answers

Students are advised to solve the Lines and Angles Multiple Choice Questions of Class 9 Maths to know different concepts. Practicing the MCQ Questions on Lines and Angles Class 9 with answers will boost your confidence thereby helping you score well in the exam.

Explore numerous MCQ Questions of Lines and Angles Class 9 with answers provided with detailed solutions by looking below.

Question 1.

In a right-angled triangle where angle A = 90° and AB = AC. What are the values of angle B?

(a) 45°

(b) 35°

(c) 75°

(d) 65°

## Answer

Answer: (a) 45°

Question 2.

In a triangle ABC if ∠A = 53° and ∠C = 44° then the value of ∠B is:

(a) 46°

(b) 83°

(c) 93°

(d) 73°

## Answer

Answer: (b) 83°

Question 3.

Given four points such that no three of them are collinear, then the number of lines that can be drawn through them are:

(a) 4 lines

(b) 8 lines

(c) 6 lines

(d) 2 lines

## Answer

Answer: (c) 6 lines

Question 4.

If one angle of triangle is equal to the sum of the other two angles then triangle is :

(a) Acute triangle

(b) Obtuse triangle

(c) Right triangle

(d) None of these

## Answer

Answer: (c) Right triangle

Question 5.

How many degrees are there in an angle which equals one-fifth of its supplement?

(a) 15°

(b) 30°

(c) 75°

(d) 150°

## Answer

Answer: (b) 30°

Question 6.

Sum of the measure of an angle and its vertically opposite angle is always.

(a) Zero

(b) Thrice the measure of the original angle

(c) Double the measure of the original angle

(d) Equal to the measure of the original angle

## Answer

Answer: (c) Double the measure of the original angle

Question 7.

If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.

(a) Equal

(b) Complementary

(c) Supplementary

(d) corresponding

## Answer

Answer: (d) corresponding

Question 8.

The bisectors of the base angles of an isosceles triangle ABC, with AB = AC, meet at O. If ∠B = ∠C = 50Â°. What is the measure of angle O?

(a) 120°

(b) 130°

(c) 80°

(d) 150°

## Answer

Answer: (b) 130°

Question 9.

The angles of a triangle are in the ratio 2 : 3 : 4. The angles, in order, are :

(a) 80°, 40°, 60°

(b) 20°, 60°, 80°

(c) 40°, 60°, 80°

(d) 60°, 40°, 80°

## Answer

Answer: (c) 40°, 60°, 80°

Question 10.

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

Answer: (b) Less than 90 degrees

Question 11.

Two parallel lines intersect at:

(a) One point

(b) Two points

(c) Three points

(d) Null

## Answer

Answer: (d) Null

Question 12.

The angle between the bisectors of two adjacent supplementary angles is :

(a) Acute angle

(b) Right angle

(c) Obtuse angle

(d) None of these

## Answer

Answer: (b) Right angle

Question 13.

Which of the following statements is false?

(a) A line can be produced to any desired length.

(b) Through a given point, only one straight line can be drawn.

(c) Through two given points, it is possible to draw one and only one straight line

(d) Two straight lines can intersect in only one point

## Answer

Answer: (b) Through a given point, only one straight line can be drawn.

Question 14.

Two parallel lines have:

(a) A common point

(b) Two common points

(c) No common point

(d) Infinite common points

## Answer

Answer: (c) No common point

Question 15.

If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the ____ interior opposite angles.

(a) Two

(b) Four

(c) One

(d) Three

## Answer

Answer: (a) Two

Question 16.

If two straight lines are perpendicular to a line l, then they are.

(a) The lines intersect each other when extended

(b) Parallel to each other

(c) The angle between the two lines is 180°

(d) Perpendicular to each other

## Answer

Answer: (b) Parallel to each other

Question 17.

Two angles whose measures are a & b are such that 2a – 3b = 60° then 5b = ?, if they form a linear pair:

(a) 120°

(b) 300°

(c) 60°

(d) None of these

## Answer

Answer: (b) 300°

Question 18.

An angle is 14° more than its complementary angle, then angle is :

(a) 38°

(b) 52°

(c) 50°

(d) None of these

## Answer

Answer: (b) 52°

Question 19.

Find the measure of the angle which is complement of itself.

(a) 30°

(b) 90°

(c) 45°

(d) 180°

## Answer

Answer: (c) 45°

Question 20.

X lies in the interior of ∠BAC. If ∠BAC = 70° and ∠BAX = 42° then ∠XAC =?

(a) 28°

(b) 29°

(c) 27°

(d) 30°

## Answer

Answer: (a) 28°

Question 21.

Two lines are parallel to each other, only when

(a) They do not intersect each other when extended on either side

(b) The lines lie on the same plane

(c) They are parallel to the plane in which they lie

(d) Their point of intersection is a unique point

## Answer

Answer: (a) They do not intersect each other when extended on either side

Question 22.

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

Answer: (a) Equal

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