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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 573 · 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 together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  14. 14.An angle measures 20°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  16. 16.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  17. 17.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  20. 20.An angle measures 150°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  21. 21.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  23. 23.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  24. 24.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  31. 31.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  32. 32.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  33. 33.An angle measures 95°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  34. 34.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. 50
  3. 75
  4. 60
  5. 65
  6. 50
  7. 30
  8. 150
  9. 170
  10. 170
  11. 135
  12. 120
  13. 70
  14. Acute
  15. 150
  16. Acute
  17. 130
  18. 55
  19. 25
  20. Obtuse
  21. 140
  22. 20
  23. Obtuse
  24. 80
  25. 120
  26. 135
  27. 80
  28. 230
  29. 15
  30. 35
  31. Straight
  32. 10
  33. Obtuse
  34. 90
  35. 140
  36. 160
  37. 160
  38. 65
  39. 130
  40. 65

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