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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 575 · 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.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 45° and 125°. What is the third angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  17. 17.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  18. 18.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  31. 31.An angle measures 145°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  32. 32.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  36. 36.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  37. 37.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. 35
  3. 120
  4. 5
  5. 120
  6. 100
  7. 150
  8. 10
  9. Right
  10. 30
  11. 40
  12. 130
  13. 85
  14. 90
  15. 210
  16. 35
  17. Obtuse
  18. 90
  19. 55
  20. 100
  21. 120
  22. 50
  23. 80
  24. 160
  25. 25
  26. 45
  27. 20
  28. 30
  29. 30
  30. 160
  31. Obtuse
  32. 80
  33. 70
  34. 75
  35. 65
  36. Obtuse
  37. 95
  38. 190
  39. 15
  40. 70

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