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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 407 · 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.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  6. 6.Two angles of a triangle are 40° and 30°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.An angle measures 45°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  16. 16.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  17. 17.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  18. 18.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  21. 21.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  22. 22.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  25. 25.An angle measures 130°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  26. 26.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 75° and 60°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 85°. 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.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. 40
  3. Straight
  4. 100
  5. Right
  6. 110
  7. 90
  8. 60
  9. 35
  10. 120
  11. 170
  12. 30
  13. 140
  14. 120
  15. Acute
  16. 95
  17. Acute
  18. 140
  19. 60
  20. 100
  21. Acute
  22. 60
  23. 100
  24. 10
  25. Obtuse
  26. 85
  27. 70
  28. 150
  29. 125
  30. 90
  31. 15
  32. 210
  33. 180
  34. 105
  35. 45
  36. 180
  37. 50
  38. 5
  39. 80
  40. 25

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