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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 744 · 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 80°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  5. 5.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  10. 10.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  16. 16.An angle measures 45°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  17. 17.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  20. 20.An angle measures 65°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  21. 21.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  25. 25.An angle measures 60°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  26. 26.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  31. 31.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  32. 32.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  33. 33.An angle measures 20°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  34. 34.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 60° and 90°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?

Answer key

  1. 75
  2. 170
  3. 180
  4. Straight
  5. 10
  6. 110
  7. 60
  8. 75
  9. Right
  10. 170
  11. 80
  12. 30
  13. 95
  14. 80
  15. 165
  16. Acute
  17. 50
  18. 10
  19. 50
  20. Acute
  21. 180
  22. 130
  23. 85
  24. 10
  25. Acute
  26. 150
  27. 20
  28. 90
  29. 60
  30. 90
  31. Acute
  32. 45
  33. Acute
  34. 170
  35. 60
  36. 30
  37. 150
  38. 210
  39. 60
  40. 75

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