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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 779 · 40 sums
TalentJR

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 65°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  6. 6.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  8. 8.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  9. 9.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  11. 11.A right angle is split into two angles. One of them is 20°. 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 150° and 120°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  24. 24.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 120°. 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.An angle measures 20°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  36. 36.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?

Answer key

  1. 115
  2. 35
  3. 90
  4. 60
  5. 65
  6. Obtuse
  7. 80
  8. Acute
  9. 65
  10. Straight
  11. 70
  12. 150
  13. 90
  14. 100
  15. 5
  16. 20
  17. 180
  18. 120
  19. 150
  20. 15
  21. 5
  22. 45
  23. Right
  24. 30
  25. 20
  26. 60
  27. 30
  28. 55
  29. 150
  30. 25
  31. 20
  32. 30
  33. 140
  34. 120
  35. Acute
  36. 130
  37. 55
  38. 105
  39. 10
  40. 45

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