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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 911 · 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 75° and 95°. What is the third angle (in degrees)?
  2. 2.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 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.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  12. 12.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  13. 13.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  14. 14.An angle measures 170°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  15. 15.An angle measures 140°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  16. 16.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  27. 27.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  28. 28.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  37. 37.An angle measures 60°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  38. 38.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?

Answer key

  1. 10
  2. Acute
  3. 60
  4. 150
  5. 120
  6. 80
  7. 40
  8. 120
  9. 85
  10. Right
  11. 60
  12. Straight
  13. 90
  14. Obtuse
  15. Obtuse
  16. 30
  17. 90
  18. 160
  19. 130
  20. 170
  21. 70
  22. 40
  23. 100
  24. 150
  25. 130
  26. 5
  27. Acute
  28. 25
  29. 50
  30. 90
  31. 130
  32. 30
  33. 150
  34. 20
  35. 90
  36. 60
  37. Acute
  38. 190
  39. 10
  40. 30

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