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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 173 · 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 together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  5. 5.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  6. 6.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 25°. 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.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  21. 21.An angle measures 135°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  22. 22.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 65° and 75°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  28. 28.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  29. 29.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  32. 32.An angle measures 35°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  33. 33.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?

Answer key

  1. 105
  2. Right
  3. 150
  4. 165
  5. Acute
  6. 30
  7. 30
  8. 10
  9. 130
  10. 10
  11. 65
  12. 150
  13. 10
  14. 40
  15. 50
  16. 120
  17. 5
  18. 160
  19. 40
  20. 125
  21. Obtuse
  22. 60
  23. 35
  24. 30
  25. 40
  26. 25
  27. 170
  28. Straight
  29. 70
  30. 155
  31. 90
  32. Acute
  33. 65
  34. 25
  35. 85
  36. 250
  37. 180
  38. 45
  39. 140
  40. 45

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