Lines and Angles Quiz - CBSE Class 9 Mathematics

Free practice quiz: Lines and Angles (CBSE Class 9 Mathematics). 19 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. If two lines intersect, how many pairs of vertically opposite angles are formed?

   1. 3
   2. 4
   3. 2
   4. 1
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   Answer: C. 2

   When two lines intersect, two pairs of vertically opposite angles are formed.

2. Which angle is formed by the hands of a clock at 3:00?

   1. 90 degrees
   2. 60 degrees
   3. 45 degrees
   4. 30 degrees
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   Answer: A. 90 degrees

   At 3:00, the hands of the clock form a right angle (90 degrees).

3. When a transversal cuts through two parallel lines, the interior angles on the same side of the transversal are:

   1. Equal
   2. Supplementary
   3. Complementary
   4. None of the above
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   Answer: B. Supplementary

   The interior angles on the same side of the transversal are supplementary, meaning they add up to 180 degrees.

4. If angle A measures 50 degrees, what is the measure of its complement?

   1. 130 degrees
   2. 40 degrees
   3. 50 degrees
   4. 60 degrees
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   Answer: B. 40 degrees

   The complement of an angle measuring 50 degrees is 90 - 50 = 40 degrees.

5. If angle A is 120 degrees, what is the measure of its supplement?

   1. 60 degrees
   2. 30 degrees
   3. 240 degrees
   4. 180 degrees
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   Answer: A. 60 degrees

   The supplement of an angle is calculated as 180 minus the angle. So, 180 - 120 = 60 degrees.

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