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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 59 · 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.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  2. 2.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  10. 10.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  11. 11.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 20° and 115°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  27. 27.An angle measures 110°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  28. 28.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  29. 29.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  33. 33.An angle measures 35°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 40
  3. 165
  4. 10
  5. 150
  6. 15
  7. 110
  8. 20
  9. 90
  10. Acute
  11. 75
  12. 180
  13. 90
  14. 45
  15. 70
  16. 125
  17. 5
  18. 40
  19. 75
  20. 200
  21. 30
  22. 135
  23. 20
  24. 65
  25. 45
  26. 210
  27. Obtuse
  28. Right
  29. 90
  30. 150
  31. 160
  32. 125
  33. Acute
  34. 35
  35. 65
  36. 85
  37. 60
  38. 120
  39. 80
  40. 160

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