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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 124 · 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.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  5. 5.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  6. 6.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  8. 8.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  11. 11.An angle measures 145°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  13. 13.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  15. 15.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  16. 16.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  22. 22.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  23. 23.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  26. 26.An angle measures 100°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  27. 27.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  30. 30.An angle measures 105°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  31. 31.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  35. 35.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  36. 36.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?

Answer key

  1. 35
  2. 65
  3. 75
  4. 60
  5. Acute
  6. 150
  7. Straight
  8. 60
  9. 150
  10. 115
  11. Obtuse
  12. Right
  13. 165
  14. 10
  15. Acute
  16. 30
  17. 20
  18. 70
  19. 90
  20. 60
  21. 50
  22. Acute
  23. 95
  24. 120
  25. 180
  26. Obtuse
  27. 60
  28. 230
  29. 70
  30. Obtuse
  31. 25
  32. 80
  33. 30
  34. 30
  35. Obtuse
  36. 5
  37. 45
  38. 50
  39. 125
  40. 70

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