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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 241 · 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.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  6. 6.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  7. 7.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  10. 10.An angle measures 160°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  11. 11.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  15. 15.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  16. 16.An angle measures 20°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  17. 17.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  21. 21.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.Two angles together make a straight line. One of them is 100°. 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 60°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  31. 31.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  32. 32.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?

Answer key

  1. Right
  2. 45
  3. 110
  4. 85
  5. 150
  6. Obtuse
  7. 50
  8. 50
  9. 60
  10. Obtuse
  11. 20
  12. 125
  13. 160
  14. 180
  15. Acute
  16. Acute
  17. 90
  18. 165
  19. 75
  20. 60
  21. Straight
  22. 80
  23. 30
  24. 30
  25. 70
  26. 60
  27. 90
  28. 160
  29. 250
  30. 210
  31. Acute
  32. 25
  33. 90
  34. 110
  35. 90
  36. 55
  37. 130
  38. 55
  39. 90
  40. 120

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