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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 802 · 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 of a triangle are 35° and 100°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  5. 5.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  8. 8.An angle measures 125°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  9. 9.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  10. 10.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  12. 12.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  17. 17.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  31. 31.An angle measures 95°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  32. 32.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  37. 37.An angle measures 110°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  38. 38.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?

Answer key

  1. 25
  2. 45
  3. 75
  4. Straight
  5. 80
  6. 60
  7. 60
  8. Obtuse
  9. Acute
  10. 70
  11. Right
  12. Acute
  13. 60
  14. 60
  15. 90
  16. 110
  17. Acute
  18. 150
  19. 80
  20. 180
  21. 10
  22. 15
  23. 10
  24. 70
  25. 90
  26. 70
  27. 95
  28. 30
  29. 150
  30. 20
  31. Obtuse
  32. 10
  33. 240
  34. 85
  35. 35
  36. 170
  37. Obtuse
  38. 200
  39. 80
  40. 30

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