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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 709 · 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.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 45° and 90°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  8. 8.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  10. 10.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  13. 13.An angle measures 65°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  14. 14.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  15. 15.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  30. 30.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 45° and 55°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?

Answer key

  1. 45
  2. 45
  3. 90
  4. 30
  5. 50
  6. 105
  7. Right
  8. 20
  9. Straight
  10. 80
  11. 75
  12. 65
  13. Acute
  14. 35
  15. Obtuse
  16. 15
  17. 55
  18. 60
  19. 220
  20. 145
  21. 260
  22. 130
  23. 80
  24. 75
  25. 65
  26. 90
  27. 25
  28. 60
  29. 30
  30. Obtuse
  31. 120
  32. 100
  33. 60
  34. 140
  35. 110
  36. 210
  37. 60
  38. 90
  39. 80
  40. 150

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