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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 591 · 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) Right (b) Obtuse (c) Acute
  2. 2.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  6. 6.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  7. 7.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 25° and 150°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  12. 12.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  26. 26.An angle measures 150°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  27. 27.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?

Answer key

  1. Right
  2. 120
  3. 130
  4. 110
  5. 60
  6. Acute
  7. 20
  8. 105
  9. 5
  10. 40
  11. Straight
  12. 60
  13. 130
  14. 100
  15. 90
  16. 115
  17. 145
  18. 5
  19. 170
  20. 85
  21. 35
  22. 55
  23. 130
  24. 210
  25. 165
  26. Obtuse
  27. 155
  28. 5
  29. 105
  30. 150
  31. 140
  32. 180
  33. 50
  34. 90
  35. 55
  36. 90
  37. 70
  38. 5
  39. 70
  40. 35

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