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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 743 · 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 of a triangle are 60° and 25°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  13. 13.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  14. 14.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 110°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  18. 18.An angle measures 60°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  19. 19.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  29. 29.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  30. 30.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  33. 33.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  34. 34.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  35. 35.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  36. 36.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?

Answer key

  1. 95
  2. 75
  3. 25
  4. 90
  5. 120
  6. 170
  7. 160
  8. 150
  9. 55
  10. 180
  11. 180
  12. 60
  13. Acute
  14. 50
  15. 35
  16. 110
  17. 10
  18. Acute
  19. 70
  20. 55
  21. 210
  22. 75
  23. 140
  24. 115
  25. 180
  26. 60
  27. 30
  28. 60
  29. Right
  30. 150
  31. 5
  32. 25
  33. Straight
  34. 70
  35. Acute
  36. 125
  37. 75
  38. 60
  39. 5
  40. 40

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