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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 749 · 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.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  4. 4.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  5. 5.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  13. 13.An angle measures 100°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  14. 14.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  15. 15.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  24. 24.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 50° and 30°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  34. 34.An angle measures 55°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  35. 35.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  38. 38.An angle measures 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  39. 39.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?

Answer key

  1. 70
  2. 110
  3. 150
  4. Acute
  5. 20
  6. 55
  7. 120
  8. 15
  9. 110
  10. Right
  11. 50
  12. 60
  13. Obtuse
  14. Acute
  15. 90
  16. 30
  17. 45
  18. 120
  19. 125
  20. 25
  21. 65
  22. 20
  23. Straight
  24. 65
  25. 15
  26. 100
  27. 30
  28. 105
  29. 120
  30. 100
  31. 230
  32. 20
  33. 45
  34. Acute
  35. 95
  36. 30
  37. 60
  38. Acute
  39. 170
  40. 140

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