CBSE Class 7 Mathematics Parallel and Intersecting Lines MCQs Set H

Question. If there is more than one set of parallel lines in a figure, the second set is shown using how many arrow marks?
(a) One
(b) Two
(c) Three
(d) Four

Answer: B

Question. What happens when two lines intersect to form four equal angles?
(a) They are parallel
(b) They are perpendicular
(c) They are transversal
(d) They do not intersect

Answer: B

Question. In Figure 5.25, angle 'd' and angle 'f' are a pair of
(a) Linear pairs
(b) Corresponding angles
(c) Alternate angles
(d) Vertically opposite angles

Answer: C

Question. Angle 'c' and angle 'e' in Figure 5.25 are also examples of
(a) Corresponding angles
(b) Linear pairs
(c) Interior angles
(d) Alternate angles

Answer: D

Question. If lines l and m are parallel, then the alternate angles formed by transversal t (like ∠d and ∠f) are always
(a) Unequal
(b) Supplementary
(c) Equal to each other
(d) Adding up to 90 degrees

Answer: C

Question. If ∠a is 120° in a pair of intersecting lines, what is the measure of its vertically opposite angle?
(a) 60°
(b) 120°
(c) 180°
(d) 90°

Answer: B

Question. To find the alternate angle of ∠f (which is ∠d), first we find the corresponding angle of ∠f, which is ∠b. Then we find the vertically opposite angle of ∠b, which is ∠d. This is a type of what in mathematics?
(a) Measurement
(b) Experiment
(c) Proof/Justification
(d) Calculation

Answer: C

Question. In Example 1, parallel lines l and m are intersected by transversal t. If ∠6 is 135°, then ∠5 is 45°. This is because ∠5 and ∠6 form a
(a) Vertically opposite pair
(b) Corresponding pair
(c) Alternate pair
(d) Linear pair

Answer: D

Question. In Example 1, ∠6 is 135°. Which angle is vertically opposite to ∠6?
(a) ∠5
(b) ∠8
(c) ∠2
(d) ∠4

Answer: B

Question. In Example 1, if ∠6 is 135°, the corresponding angle ∠2 must be
(a) 45°
(b) 135°
(c) 180°
(d) 90°

Answer: B

Question. What are vertically opposite angles?
(a) Angles that add up to 180°
(b) Angles that are equal and opposite each other at an intersection
(c) Angles that are perpendicular
(d) Angles formed by parallel lines

Answer: B

Question. In Example 1, if ∠6 is 135°, the angle that is alternate to ∠3 is
(a) ∠1
(b) ∠2
(c) ∠7
(d) ∠4

Answer: B

Question. In Example 2, line l and line m are NOT parallel because the corresponding angles ∠b (60°) and ∠f (70°) are
(a) Equal
(b) Unequal
(c) Supplementary
(d) Right angles

Answer: B

Question. In Example 3, parallel lines l and m are cut by transversal t. ∠3 and ∠6 are called
(a) Alternate angles
(b) Interior angles
(c) Linear pairs
(d) Exterior angles

Answer: B

Question. What is the sum of the angles in a linear pair?
(a) 90°
(b) 180°
(c) 360°
(d) 120°

Answer: B

Question. If two parallel lines are cut by a transversal, the interior angles on the same side of the transversal always
(a) Are equal
(b) Add up to 90 degrees
(c) Add up to 180 degrees
(d) Are vertically opposite

Answer: C

Question. In Example 3, if ∠3 is 50°, then ∠6 is 130°. How do we find this value?
(a) ∠6 = ∠3
(b) ∠6 = 180° - ∠3
(c) ∠6 = 90° + ∠3
(d) ∠6 = 360° - ∠3

Answer: B

Question. In Example 4, line segment AB is parallel to CD, and AD is the transversal. ∠ADC and ∠DAB are interior angles on the same side, so their sum is
(a) 90°
(b) 360°
(c) 180°
(d) 60°

Answer: C

Question. How many angles are formed when two straight lines intersect?
(a) Two
(b) Three
(c) Four
(d) Six

Answer: C

Question. In Example 4, if ∠ADC is 60°, then ∠DAB must be
(a) 60°
(b) 120°
(c) 100°
(d) 180°

Answer: B