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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 47 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  2. 2.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  11. 11.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  12. 12.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  18. 18.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  20. 20.An angle measures 60°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  21. 21.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  22. 22.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  23. 23.An angle measures 50°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  24. 24.Two angles of a triangle are 85° and 85°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  27. 27.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  28. 28.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  33. 33.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  34. 34.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 65° and 80°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 115
  3. 5
  4. 75
  5. 65
  6. 75
  7. 220
  8. 170
  9. 20
  10. 80
  11. Obtuse
  12. 90
  13. 200
  14. 45
  15. 40
  16. 150
  17. Right
  18. 70
  19. 35
  20. Acute
  21. 80
  22. Acute
  23. Acute
  24. 10
  25. 120
  26. 180
  27. Acute
  28. 90
  29. 60
  30. 90
  31. 60
  32. 30
  33. Obtuse
  34. 170
  35. 160
  36. 25
  37. 30
  38. 160
  39. 35
  40. 100

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