CBSE Class 9 Mathematics/Lines and Angles / MCQ

CBSE Class 9 Mathematics/Lines and Angles/MCQ is about the multiple choice questions that you can expect for yearly examination. Here you can find out practice problems for Class 9 Mathematics from the chapter 6 – Lines and Angles.

CBSE Class 9 Mathematics/ Lines and Angles – Chapter 6/ MCQ
Multiple Choice Questions/ Extra Questions for Practice
Choose the correct answer from the options given below:

1. A part of a line with two end points is called a ———–
   A. Line
   B. Line Segment
   C. Ray
2. A part of a line with one end point is called a ——-
   A. Line
   B. Line Segment
   C. Ray
3. If three or more points lie on the same line, they are called ———-
   A. Similar points
   B. Collinear points
   C. Intersecting points
4. The rays making angles are called the —– of the angle.
   A. Measure
   B. Degree
   C. Arms
5. Two angles whose sum is 90 degree are called ————-
   A. Complementary angles
   B. Supplementary angles
   C. Right angles
6. If the sum of two adjacent angles is 180 degree, then they form a ———– angles.
   A. Vertically opposite angles
   B. Corresponding angles
   C. Linear pair of angles
7. Complement of an angle x is ————-
   A. 90
   B. 90 – x
   C. 90 + x
8. Supplement of an angle x is ———-
   A. 180
   B. 180 – x
   C. 180 + x
9. If the supplement of an angle is 4 times its complement, then the measure of the angle is ——–
   A. 30 degree
   B. 60 degree
   C. 90 degree
10. An angle which is equal to its complement is ———-
    A. 45 degree
    B. 60 degree
    C. 90 degree
11. An angle which is equal to its supplement is ————
    A. 45 degree
    B. 90 degree
    C. 180 degree
12. A line which intersects two or more lines at distinct points is called a ————–
    A. Transversal
    B. Parallel line
    C. Intersecting line
13. In triangle PQR, <P = 45, <Q = 90, find <R?
    A. 45
    B. 135
    C. 90
14. 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. One
    B. Two
    C. Three
15. Which of the following is a false statement?
    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 equal.

ANSWERS:

1. Line Segment
2. Ray
3. Collinear Points
4. Arms
5. Complementary angles
6. Linear pair of angles
7. 90 – x
8. 180 – x
9. 60 degree
   [Given 180 – x = 4(90 – x)
   180 – x = 360 – 4x
   360 – 180 = -x + 4x
   180 = 3x
   x = 180/3 = 60]
10. 45 degree
11. 90 degree
12. Transversal
13. 45
14. Two
15. Each pair of interior angles on the same side of the transversal is equal.