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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 7 · 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 80°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  5. 5.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  7. 7.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  13. 13.An angle measures 100°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  14. 14.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 9 o'clock (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.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  24. 24.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  25. 25.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  29. 29.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  30. 30.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  35. 35.An angle measures 40°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  36. 36.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?

Answer key

  1. 10
  2. 45
  3. 70
  4. Straight
  5. 65
  6. Right
  7. 60
  8. 10
  9. 135
  10. 20
  11. 155
  12. 90
  13. Obtuse
  14. 60
  15. 130
  16. 45
  17. 90
  18. 125
  19. 35
  20. 160
  21. 25
  22. 140
  23. 10
  24. Acute
  25. 65
  26. 40
  27. 75
  28. 150
  29. Acute
  30. 150
  31. 85
  32. 120
  33. 75
  34. 90
  35. Acute
  36. 180
  37. 150
  38. 30
  39. 180
  40. 230

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