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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 511 · 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 40°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  4. 4.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 60° and 95°. What is the third angle (in degrees)?
  10. 10.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  21. 21.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  22. 22.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  28. 28.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (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.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  32. 32.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  36. 36.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  37. 37.Two angles together make a straight line. One of them is 130°. What is the other angle (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.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  40. 40.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?

Answer key

  1. 50
  2. 40
  3. Right
  4. 50
  5. 60
  6. 35
  7. 80
  8. 120
  9. 25
  10. Obtuse
  11. 75
  12. 70
  13. 65
  14. 30
  15. 90
  16. 160
  17. 70
  18. 150
  19. 110
  20. 20
  21. Acute
  22. 10
  23. 30
  24. 75
  25. 20
  26. 180
  27. Acute
  28. 5
  29. 60
  30. 125
  31. Straight
  32. 120
  33. 145
  34. 80
  35. 110
  36. Acute
  37. 50
  38. 35
  39. Acute
  40. 15

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