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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 457 · 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.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  2. 2.An angle measures 140°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  3. 3.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  4. 4.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  7. 7.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  8. 8.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  11. 11.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  13. 13.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  14. 14.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  16. 16.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  17. 17.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  28. 28.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  30. 30.An angle measures 20°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  31. 31.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  33. 33.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  34. 34.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  37. 37.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  38. 38.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  39. 39.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?

Answer key

  1. 15
  2. Obtuse
  3. Straight
  4. 60
  5. 190
  6. 45
  7. Acute
  8. 20
  9. 90
  10. Right
  11. 55
  12. 155
  13. Acute
  14. 90
  15. 120
  16. Obtuse
  17. 30
  18. 5
  19. 160
  20. 160
  21. 130
  22. 135
  23. 165
  24. 180
  25. 120
  26. 120
  27. Acute
  28. 80
  29. 70
  30. Acute
  31. 30
  32. 15
  33. Acute
  34. 75
  35. 230
  36. 70
  37. Acute
  38. Obtuse
  39. 170
  40. 150

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