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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 310 · 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 85° and 55°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 85° and 85°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  6. 6.An angle measures 35°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  7. 7.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  8. 8.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  9. 9.Two angles of a triangle are 45° and 50°. What is the third angle (in degrees)?
  10. 10.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  11. 11.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  25. 25.An angle measures 45°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  26. 26.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  27. 27.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  34. 34.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  35. 35.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. 65
  3. 90
  4. 10
  5. 80
  6. Acute
  7. Right
  8. Straight
  9. 85
  10. Obtuse
  11. 190
  12. 70
  13. 55
  14. 60
  15. 115
  16. 40
  17. 5
  18. 140
  19. 90
  20. 75
  21. 25
  22. 85
  23. 120
  24. 150
  25. Acute
  26. Acute
  27. 130
  28. 15
  29. 165
  30. 60
  31. 145
  32. 180
  33. 140
  34. Acute
  35. 100
  36. 5
  37. 70
  38. 75
  39. 30
  40. 160

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