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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 794 · 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 170°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  3. 3.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  5. 5.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  9. 9.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  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 4 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 30° and 130°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 35° and 140°. What is the third angle (in degrees)?
  19. 19.An angle measures 35°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  20. 20.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  24. 24.An angle measures 70°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  25. 25.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  28. 28.An angle measures 55°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  29. 29.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  33. 33.An angle measures 80°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  34. 34.Three angles meet at a point. Two of them are 150° and 150°. 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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 70° and 70°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. Obtuse
  3. 170
  4. Straight
  5. 60
  6. 70
  7. 155
  8. 80
  9. Acute
  10. 145
  11. 120
  12. 40
  13. 130
  14. 165
  15. 70
  16. 20
  17. 170
  18. 5
  19. Acute
  20. 125
  21. 10
  22. 60
  23. 120
  24. Acute
  25. 50
  26. 70
  27. 115
  28. Acute
  29. 130
  30. 90
  31. 15
  32. 100
  33. Acute
  34. 60
  35. 110
  36. 90
  37. 65
  38. 40
  39. 60
  40. 250

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