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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 563 · 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 20°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 135°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  14. 14.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  15. 15.An angle measures 110°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  16. 16.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  18. 18.An angle measures 125°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  19. 19.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  20. 20.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  21. 21.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  28. 28.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  29. 29.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  38. 38.An angle measures 115°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  39. 39.An angle measures 105°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  40. 40.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute

Answer key

  1. 85
  2. 15
  3. 130
  4. 155
  5. 65
  6. 105
  7. 150
  8. 70
  9. 170
  10. 180
  11. 50
  12. 150
  13. 150
  14. Obtuse
  15. Obtuse
  16. 180
  17. Straight
  18. Obtuse
  19. 65
  20. Acute
  21. 65
  22. 5
  23. 115
  24. 55
  25. 120
  26. 90
  27. 120
  28. Obtuse
  29. 90
  30. 145
  31. 35
  32. 60
  33. 35
  34. 30
  35. 60
  36. 75
  37. 75
  38. Obtuse
  39. Obtuse
  40. Right

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