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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 70 · 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 80° and 110°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  3. 3.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  8. 8.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  20. 20.An angle measures 110°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  21. 21.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  25. 25.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  26. 26.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  28. 28.An angle measures 30°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  29. 29.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?

Answer key

  1. 170
  2. Straight
  3. 110
  4. 140
  5. 40
  6. 170
  7. Right
  8. 5
  9. 75
  10. 30
  11. 55
  12. 90
  13. 120
  14. 190
  15. 140
  16. 150
  17. 85
  18. 60
  19. 100
  20. Obtuse
  21. 240
  22. 5
  23. 15
  24. 25
  25. Acute
  26. 55
  27. 70
  28. Acute
  29. 165
  30. 150
  31. 30
  32. 140
  33. 120
  34. 20
  35. 110
  36. 70
  37. 60
  38. 90
  39. 20
  40. 55

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