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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 970 · 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.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  3. 3.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  4. 4.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  12. 12.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  13. 13.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  15. 15.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  28. 28.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  29. 29.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 65° and 80°. 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.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  39. 39.An angle measures 155°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  40. 40.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?

Answer key

  1. 150
  2. 155
  3. Obtuse
  4. Acute
  5. 70
  6. Straight
  7. 40
  8. 65
  9. 60
  10. 145
  11. 150
  12. Obtuse
  13. 50
  14. Right
  15. 120
  16. 30
  17. 95
  18. 20
  19. 150
  20. 120
  21. 210
  22. 90
  23. 45
  24. 55
  25. 100
  26. 90
  27. 100
  28. Acute
  29. 15
  30. 125
  31. 230
  32. 105
  33. 15
  34. 65
  35. 80
  36. 35
  37. 130
  38. 85
  39. Obtuse
  40. 60

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