Lines and Angles/ MCQ/CBSE Class 9 Mathematics.

Lines and Angles – Chapter 6/MCQ/CBSE Class 9 Mathematics is about the Multiple Choice Questions that you can expect for Yearly Examination. Here you can find out practice problems for Class 9 Mathematics.

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

1. Triangle PQR is right angled at Q and PQ = QR. Find the angle measure of angle P?
   A. 45
   B. 35
   C. 75
   Answer: 45 degree
2. In a triangle ABC, if the sum of two angles is 125 degree, find the measure of third angle?
   A. 55
   B. 45
   C. 65
   Answer: 55 degree
3. In a triangle if one angle is equal to the sum of the other two angles, then the triangle is ———
   A. Acute angled
   B. Obtuse angled
   C. Right angled
   Answer: Right angled
4. If two parallel lines are cut by a transversal, then the sum of the interior angles on the same side of transversal are ———-
   A. Complementary
   B. Supplementary
   C. Equal
   Answer: Supplementary
5. An angle which is greater than 180 degree but less than 360 degree is called a ——– angle.
   A. Straight angle
   B. Reflex angle
   C. Right angle
   Answer: Reflex angle
6. Two angles whose measures are a and b are such that 3a – b = 60 degree. Find the value of a, if they form a linear pair?
   A. 40 degree
   B. 60 degree
   C. 80 degree
   Answer: 60 degree
7. Two angles form a linear pair. If one angle is 45 degree, find the angle measure of other angle?
   A. 135 degree
   B. 115 degree
   C. 45 degree
   Answer: 135 degree
8. If one angle measure is x, then the complement of x is ———-
   A. 90 – x
   B. 90 + x
   C. 180 – x
   Answer: 90 – x
9. The supplement of a right angle is ————-
   A. Acute angle
   B. Obtuse angle
   C. Right angle
   Answer: Right angle
10. The supplement of an acute angle is always an ———- angle.
    A. Acute
    B. Obtuse
    C. Right
    Answer: Obtuse
11. If two parallel lines are cut by a transversal, then the two interior angles on the same side of transversal are in the ratio 1:2, then the measure of greater angle is ———–
    A. 60
    B. 90
    C. 120
    Answer: 120 degree
12. The angles of a triangle are in the ratio 2: 3: 4. Then the triangle is a ————- angled triangle.
    A. Acute
    B. Obtuse
    C. Right
    Answer: Acute
13. The angles of a triangle are in the ratio 2: 3: 4. Then the greatest angle of the triangle is —–
    A. 40
    B. 60
    C. 80
    Answer: 80 degree
14. Two parallel lines intersect at ——— points
    A. One
    B. Two
    C. Never intersects
    Answer: Never intersects
15. Exterior angle of a triangle is equal to the sum of its ——– interior opposite angles.
    A. One
    B. Two
    C. Three
    Answer: Two