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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 873 · 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) Acute (b) Obtuse (c) Right
  2. 2.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  6. 6.An angle measures 85°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  12. 12.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  24. 24.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  25. 25.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  26. 26.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 50° and 115°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  34. 34.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  35. 35.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?

Answer key

  1. Right
  2. 155
  3. 55
  4. 35
  5. 200
  6. Acute
  7. 150
  8. 110
  9. 75
  10. 10
  11. Straight
  12. 60
  13. 55
  14. 5
  15. 130
  16. 125
  17. 90
  18. 10
  19. 30
  20. 45
  21. 40
  22. 35
  23. Acute
  24. 170
  25. Obtuse
  26. 70
  27. 40
  28. 15
  29. 30
  30. 50
  31. 80
  32. 10
  33. 190
  34. Acute
  35. 140
  36. 180
  37. 5
  38. 45
  39. 120
  40. 50

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