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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 494 · 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 170°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  4. 4.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  8. 8.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  9. 9.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  12. 12.An angle measures 45°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  13. 13.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  20. 20.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  21. 21.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 75°. 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.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  26. 26.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  28. 28.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  29. 29.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 35° and 130°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?

Answer key

  1. 10
  2. 85
  3. Straight
  4. 70
  5. 80
  6. 90
  7. 180
  8. Obtuse
  9. 55
  10. 90
  11. Acute
  12. Acute
  13. 75
  14. 170
  15. 190
  16. 15
  17. 220
  18. 75
  19. 75
  20. Right
  21. 50
  22. 30
  23. 105
  24. 20
  25. Obtuse
  26. 200
  27. 120
  28. Acute
  29. 15
  30. 30
  31. 130
  32. 90
  33. 160
  34. 120
  35. 30
  36. 35
  37. 15
  38. 110
  39. 155
  40. 100

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