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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 638 · 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 30°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 80°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  11. 11.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  20. 20.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  30. 30.An angle measures 60°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  31. 31.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 50°. 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.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?

Answer key

  1. 150
  2. 70
  3. 140
  4. 70
  5. 120
  6. 40
  7. 155
  8. 120
  9. 10
  10. Straight
  11. 130
  12. 210
  13. 100
  14. 200
  15. 45
  16. 220
  17. 10
  18. 85
  19. Right
  20. 50
  21. 40
  22. 65
  23. 200
  24. 260
  25. 40
  26. 30
  27. 220
  28. 160
  29. 90
  30. Acute
  31. 125
  32. 75
  33. 15
  34. 150
  35. 15
  36. 90
  37. 160
  38. 130
  39. 10
  40. 45

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