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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 394 · 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 110°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  7. 7.An angle measures 70°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  19. 19.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  20. 20.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  21. 21.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  28. 28.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  29. 29.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  31. 31.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  32. 32.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  40. 40.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Straight

Answer key

  1. 70
  2. 40
  3. 120
  4. 135
  5. 140
  6. 45
  7. Acute
  8. 90
  9. Right
  10. 75
  11. 145
  12. 180
  13. 25
  14. 85
  15. 170
  16. 130
  17. 240
  18. 65
  19. Acute
  20. Obtuse
  21. 160
  22. 30
  23. 30
  24. 20
  25. 120
  26. 35
  27. 100
  28. Obtuse
  29. 10
  30. 60
  31. Straight
  32. 35
  33. 150
  34. 20
  35. 50
  36. 80
  37. 50
  38. 35
  39. 190
  40. Acute

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