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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 543 · 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 110°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  5. 5.An angle measures 125°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  6. 6.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  10. 10.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  11. 11.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  12. 12.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  13. 13.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  16. 16.An angle measures 170°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  17. 17.Two angles of a triangle are 20° and 130°. What is the third angle (in degrees)?
  18. 18.An angle measures 100°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  19. 19.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  20. 20.An angle measures 130°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  21. 21.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  24. 24.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  25. 25.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 60° and 35°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  34. 34.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  35. 35.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 30
  3. 125
  4. 55
  5. Obtuse
  6. 30
  7. 30
  8. 210
  9. 75
  10. Acute
  11. 90
  12. Obtuse
  13. 140
  14. 45
  15. 10
  16. Obtuse
  17. 30
  18. Obtuse
  19. 35
  20. Obtuse
  21. 180
  22. 15
  23. 120
  24. Acute
  25. 230
  26. 50
  27. 85
  28. 45
  29. 5
  30. 125
  31. 60
  32. 30
  33. 85
  34. Right
  35. 55
  36. 150
  37. 120
  38. 35
  39. 85
  40. 60

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