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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 805 · 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.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  12. 12.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 45° and 125°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  19. 19.An angle measures 145°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  20. 20.An angle measures 100°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  21. 21.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  22. 22.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  34. 34.An angle measures 165°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  35. 35.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  36. 36.An angle measures 70°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  37. 37.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 135
  3. 200
  4. 30
  5. 70
  6. 110
  7. 240
  8. 165
  9. 200
  10. 150
  11. Straight
  12. 55
  13. 20
  14. 20
  15. 10
  16. 150
  17. 130
  18. Right
  19. Obtuse
  20. Obtuse
  21. Acute
  22. 150
  23. 35
  24. 75
  25. 180
  26. 85
  27. 10
  28. 110
  29. 50
  30. 140
  31. 85
  32. 60
  33. 90
  34. Obtuse
  35. 50
  36. Acute
  37. 85
  38. 40
  39. 25
  40. 65

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