# Class 9 Maths Lines And Angles Chapter 6 Extra Questions For Practice

CBSE CLASS 9 MATHEMATICS / MCQ

MULTIPLE CHOICE QUESTIONS ON LINES AND ANGLES – Chapter 6

1. If a ray stands on a line, then the sum of the two adjacent angles so formed is ——– and vice versa.

A. 90

B. 180

C. 360

2. If two lines intersect each other, then the ———– angles are equal.

A. Vertically opposite angles

B. Linear pair

C. Adjacent angles

3. If a transversal intersects two parallel lines then, which of the following statements are true?

A. Each pair of corresponding angles is equal.

B. Each pair of alternate interior angles is equal.

C. Each pair of interior angles on the same side of the transversal is supplementary.

D. All statements are true.

4. Lines which are parallel to a given line are ——— to each other.

A. Perpendicular

B. Parallel

C. Equal

5. The sum of three angles of a triangle is —————

A. 90

B. 180

C. 360

6. If a side of a triangle is produced the exterior angle so formed is equal to the sum of the two———- angles.

A. Opposite angles

B. Interior opposite angles

C. Adjacent angles

7. If three or more points lie on the same line, they are called—————–

A. Collinear points

B. Non collinear points

C. Concurrent points

8. Two angles whose sum is 90 degree are called————-

A. Complementary angles

B. Supplementary angles

C. Adjacent angles

9. Two angles whose sum is 180 degree are called ————-

A. Complementary angles

B. Supplementary angles

C. Opposite angles

10. When the sum of two adjacent angles is 180 degree, then they are called a ——————-

A. Vertically opposite angles

B. Linear pair of angles

C. Corresponding angles

11. Two angles form a linear pair. If one angle is 80 degree, the measure of other angle is —————-

A. 100

B. 80

C. 10

12. If two complementary angles are in the ratio 2:3 then the angles are ————–

A. 36, 54

B. 45, 45

C. 40, 50

13. An exterior angle of a triangle is 120 degree and its interior opposite angles are equal, and then the triangle is ——————

A. Scalene triangle

B. Equilateral triangle

C. Isosceles triangle

14. The angles of a triangle are in the ratio 2:3:4. The triangle is a ——————

A. Scalene Triangle

B. Equilateral triangle

C. Isosceles triangle

15. If the sum of two adjacent angles is 180 degree then the non-common arms of the angles form a —————

A.Parallel line

B. Perpendicular line

C. Straight line

**ANSWERS:**

1. 180 (Linear pair axiom)

2. Vertically opposite angles

3. All statements are true.

4. Parallel

5. 180

6. Interior opposite

7. Collinear points

8. Complementary angles

9. Supplementary angles

10. Linear pair of angles

11. 100

12. 36, 54

13. Equilateral triangle

14. Scalene triangle

15. Straight line

Nice theory question but practical should be more

Yes you are right

Nice