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Lines and Angles

Lines and Angles · Class 6 Mathematics

Practise 50 short and long answer questions on Lines and Angles from Lines and Angles. Try writing your own answer first, then tap the question to compare it with the model answer and read the explanation behind it.

1 An angle measures 15°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 15° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

2 An angle measures 20°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 20° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

3 An angle measures 25°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 25° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

4 An angle measures 30°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 30° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

5 An angle measures 35°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 35° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

6 An angle measures 40°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 40° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

7 An angle measures 45°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 45° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

8 An angle measures 50°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 50° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

9 An angle measures 55°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 55° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

10 An angle measures 60°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 60° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

11 An angle measures 65°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 65° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

12 An angle measures 70°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 70° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

13 An angle measures 75°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 75° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

14 An angle measures 80°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 80° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

15 An angle measures 85°. Classify it and justify your answer. 2 marks
Model answer

It is an acute angle because 85° is less than 90°.

Explanation

An acute angle is greater than 0° and less than a right angle.

16 An angle measures 95°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

17 An angle measures 100°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

18 An angle measures 105°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

19 An angle measures 110°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

20 An angle measures 115°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

21 An angle measures 120°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

22 An angle measures 125°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

23 An angle measures 130°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

24 An angle measures 135°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

25 An angle measures 140°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

26 An angle measures 145°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

27 An angle measures 150°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

28 An angle measures 155°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

29 An angle measures 160°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

30 An angle measures 165°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

31 An angle measures 170°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

32 An angle measures 175°. Classify it and explain how it compares with a right angle. 2 marks
Model answer

It is an obtuse angle because it is greater than 90° and less than 180°.

Explanation

An obtuse angle lies between a right angle and a straight angle.

33 An angle is 10°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

10° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

34 An angle is 20°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

20° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

35 An angle is 30°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

30° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

36 An angle is 40°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

40° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

37 An angle is 50°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

50° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

38 An angle is 60°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

60° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

39 An angle is 70°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

70° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

40 An angle is 80°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

80° is a acute angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

41 An angle is 90°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

90° is a right angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

42 An angle is 100°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

100° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

43 An angle is 110°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

110° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

44 An angle is 120°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

120° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

45 An angle is 130°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

130° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

46 An angle is 140°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

140° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

47 An angle is 150°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

150° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

48 An angle is 160°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

160° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

49 An angle is 170°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

170° is a obtuse angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

50 An angle is 180°. State whether it is acute, right, obtuse, straight or reflex, and give a reason. 3 marks
Model answer

180° is a straight angle.

Explanation

Angle classification depends on comparing its measure with 90° and 180°.

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