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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 357 · 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 100° and 45°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  10. 10.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  20. 20.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  23. 23.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  32. 32.An angle measures 30°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  33. 33.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  34. 34.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 115°. 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. 35
  2. 130
  3. 155
  4. 150
  5. 70
  6. 10
  7. 190
  8. 180
  9. Obtuse
  10. 190
  11. 120
  12. 30
  13. 150
  14. 40
  15. 170
  16. 60
  17. 80
  18. 125
  19. Straight
  20. 165
  21. 60
  22. Right
  23. 140
  24. 30
  25. 85
  26. 180
  27. 55
  28. 90
  29. 150
  30. 160
  31. 170
  32. Acute
  33. Acute
  34. 190
  35. 30
  36. 160
  37. 20
  38. 30
  39. 65
  40. 25

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