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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 416 · 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 together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  7. 7.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  13. 13.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  14. 14.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  16. 16.An angle measures 15°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  17. 17.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 20° and 95°. What is the third angle (in degrees)?
  20. 20.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  27. 27.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  28. 28.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  38. 38.An angle measures 95°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  39. 39.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?

Answer key

  1. 15
  2. 105
  3. 55
  4. 30
  5. 180
  6. Straight
  7. 130
  8. 70
  9. 45
  10. 120
  11. 170
  12. 150
  13. Obtuse
  14. 115
  15. 25
  16. Acute
  17. 110
  18. 250
  19. 65
  20. Acute
  21. 40
  22. 75
  23. 115
  24. 100
  25. 30
  26. 25
  27. Right
  28. 60
  29. 150
  30. 210
  31. 220
  32. 135
  33. 65
  34. 90
  35. 60
  36. 80
  37. 90
  38. Obtuse
  39. 90
  40. 50

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