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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 789 · 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 25° and 50°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  4. 4.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  10. 10.An angle measures 65°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  19. 19.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  21. 21.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  22. 22.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  35. 35.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  36. 36.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 70°. What is the other 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. 105
  2. 150
  3. Straight
  4. 210
  5. 5
  6. 55
  7. 160
  8. 60
  9. 35
  10. Acute
  11. 65
  12. 160
  13. 120
  14. 170
  15. 95
  16. Right
  17. 45
  18. Acute
  19. 100
  20. 55
  21. Acute
  22. 10
  23. 100
  24. 25
  25. 35
  26. 30
  27. 125
  28. 75
  29. 180
  30. 85
  31. 150
  32. 85
  33. 155
  34. 50
  35. Obtuse
  36. 25
  37. 50
  38. 140
  39. 110
  40. 150

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