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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 523 · 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 80° and 45°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  8. 8.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  15. 15.An angle measures 50°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  16. 16.Two angles of a triangle are 20° and 130°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 80°. What is the other 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.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  26. 26.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  27. 27.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  28. 28.An angle measures 100°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  29. 29.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  32. 32.An angle measures 20°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  33. 33.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  37. 37.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  38. 38.An angle measures 125°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  39. 39.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?

Answer key

  1. 55
  2. 190
  3. 50
  4. 110
  5. 70
  6. 70
  7. Straight
  8. 25
  9. 50
  10. 60
  11. 80
  12. 60
  13. 60
  14. 130
  15. Acute
  16. 30
  17. 160
  18. 10
  19. 55
  20. 180
  21. 135
  22. 30
  23. 90
  24. 90
  25. 150
  26. Obtuse
  27. 105
  28. Obtuse
  29. 120
  30. 130
  31. 25
  32. Acute
  33. 35
  34. 120
  35. 45
  36. 100
  37. Acute
  38. Obtuse
  39. 70
  40. 65

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