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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 936 · 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 30°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  4. 4.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 40° and 85°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  23. 23.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  24. 24.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  26. 26.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  27. 27.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  36. 36.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  37. 37.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. 90
  3. Right
  4. 45
  5. 170
  6. 110
  7. 85
  8. 150
  9. 150
  10. 170
  11. 170
  12. 170
  13. 150
  14. 140
  15. 90
  16. 110
  17. 55
  18. 90
  19. 35
  20. 80
  21. 180
  22. 160
  23. Acute
  24. 70
  25. 120
  26. Straight
  27. 90
  28. 140
  29. 70
  30. 60
  31. 160
  32. 45
  33. 50
  34. 30
  35. 50
  36. Obtuse
  37. 50
  38. 120
  39. 75
  40. 140

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