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| Maths Quiz for Class 7 Lines and Angles |
In this post, you will find 20 online maths quiz questions for class 7 lines and angles. Online maths quiz will take around 20 minutes to complete it.
Question 1: The complementary angle of 35° is ____________.
A) 35°
B) 145°
C) 55°
D) 65°
Explanation: The complementary angle of 35° = 90° – 35° = 55°
Question 2: The supplementary angle of 115° is ____________.
A) 65°
B) 75°
C) 85°
D) 25°
Explanation: The supplementary angle of 115° = 180° – 115° = 65°
Question 3: Which of the following pairs of angles is complementary angles?
A) 72°, 18°
B) 95°, 85°
C) 130°, 60°
D) 60°, 40°
Explanation: The pair of angles whose sum is 90°, is called complementary angles.
Question 4: Which of the following pairs of angles is supplementary angles?
A) 65°, 25°
B) 125°, 55°
C) 142°, 48°
D) 55°, 45°
Explanation: The pair of angles whose sum is 180°, is called supplementary angles.
Question 5: If one angle of a linear pair measures 110°, then find the measure of the other angle.
A) 80°
B) 70°
C) 20°
D) 90°
Explanation: The sum of the angles of a linear pair is 180°. Therefore, the measure of the other angle = 180° – 110° = 70°
Question 6: Two lines intersect each other at a point O. If one angle between the lines is 45°, then find the measures of the other three angles.
A) 35°, 45° and 135°
B) 135°, 45° and 55°
C) 135°, 45° and 135°
D) 135°, 45° and 45°
Explanation: If two lines intersect, four angles are formed. If one angle measures 45°, then its linear pair is 135° and its vertically opposite angle is 45°. So, the other three angles are 135°, 45° and 135°.
Question 7: The measure of the vertically opposite angle of 95° is _________.
A) 85°
B) 95°
C) 75°
D) 5°
Explanation: Vertically opposite angles are equal in measure.
Question 8: In the given figure, find the value of x.
A) x = 60°
B) x = 90°
C) x = 140°
D) x = 40°
Explanation: In the given figure, x and 40° are alternate interior angles and they are equal in measure. Therefore, x = 40°.
Question 9: In the given figure, find the value of y.
A) y = 140°
B) y = 90°
C) y = 50°
D) y = 40°
Explanation: In the given figure, x and y are linear pair of angles. So, x + y = 180° => 40° + y = 180° => y = 180° – 40° = 140°
Question 10: In the given figure, the angles x° and 35° are called ________________.
A) complementary angles
B) linear pair of angles
C) co-interior angles
D) adjacent angles
Explanation: The interior angles lies on one side of a transversal are called consecutive interior angles or co-interior angles.
Question 11: Find the value of x in the given figure.
A) x = 135°
B) x = 145°
C) x = 65°
D) x = 55°
Explanation: The angles of x° and 35° are co-interior angles. Co-interior angles are supplementary. Therefore, x + 35° = 180° => x = 180° – 35° = 145°
Question 12: Find the complement of any angle x°.
A) 90° + x°
B) 90° – x°
C) 180° + x°
D) 180° – x°
Explanation: The complement of any angle x° = 90° – x°
Question 13: Find the supplement of any angle y°.
A) 180° – y°
B) 180° + y°
C) 90° – y°
D) 90° + y°
Explanation: The supplement of any angle y° = 180° – y°
Question 14: Find the value of x from the given figure.
A) x = 145°
B) x = 45°
C) x = 35°
D) x = 135°
Explanation: From the given figure, x° + 45° = 180° => x = 180° – 45° = 135°
Question 15: In the given figure, the value of y is ____________.
A) y = 55°
B) y = 145°
C) y = 45°
D) y = 135°
Explanation: In the given figure, y is corresponding angle of 45°. Therefore, y = 45°
Question 16: A line which intersect two parallel lines is called a _________________.
A) linear pair
B) transversal
C) perpendicular line
D) interior line
Explanation: A line which intersect two parallel lines is called a transversal.
Question 17: When two parallel lines are intersected by a transversal, then the sum of co-interior angles is ______________.
A) 180°
B) 90°
C) 135°
D) 360°
Explanation: When two parallel lines are intersected by a transversal, then the sum of co-interior angles is 180°.
Question 18: If two parallel lines are intersected by a transversal and one of the co-interior angles is 65°, then the other co-interior angle is __________.
A) 125°
B) 25°
C) 115°
D) 15°
Explanation: The other co-interior angle = 180° – 65° = 115°
Question 19: In the given figure, if the measure of ∠2 is 50°, then the measure of ∠6 is ___________.
A) 130°
B) 50°
C) 60°
D) 40°
Explanation: ∠2 and ∠6 are corresponding angles and they are equal. Therefore, ∠6 = 50°.
Question 20: In the given figure, if the measure of ∠3 is 120°, then the measure of ∠5 is ___________.
A) 60°
B) 130°
C) 120°
D) 110°
Explanation: ∠3 and ∠5 are alternate interior angles and they are equal. Therefore, ∠5 = 120°.
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