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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 974 · 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.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  4. 4.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  6. 6.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  11. 11.An angle measures 115°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  12. 12.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  13. 13.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  17. 17.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  18. 18.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  21. 21.An angle measures 140°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 20° and 155°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 30° and 90°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. 40
  3. Straight
  4. 90
  5. Right
  6. 70
  7. 180
  8. 90
  9. 70
  10. 250
  11. Obtuse
  12. Acute
  13. 110
  14. 110
  15. 80
  16. 35
  17. Obtuse
  18. 85
  19. 30
  20. 45
  21. Obtuse
  22. 30
  23. 50
  24. 75
  25. 120
  26. 130
  27. 5
  28. 80
  29. 70
  30. 10
  31. 60
  32. 5
  33. 60
  34. 120
  35. 60
  36. 30
  37. 20
  38. 125
  39. 165
  40. 45

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