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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 876 · 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.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  2. 2.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 55° and 100°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  13. 13.An angle measures 145°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  14. 14.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  20. 20.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  21. 21.An angle measures 20°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 110°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  30. 30.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  31. 31.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  33. 33.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  34. 34.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  35. 35.Three angles meet at a point. Two of them are 60° and 150°. 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.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?

Answer key

  1. Right
  2. 90
  3. 85
  4. 150
  5. 30
  6. 190
  7. 5
  8. 25
  9. 90
  10. 25
  11. 15
  12. 90
  13. Obtuse
  14. 120
  15. 55
  16. 40
  17. 30
  18. 130
  19. Straight
  20. 30
  21. Acute
  22. 170
  23. 105
  24. 50
  25. 120
  26. 65
  27. 115
  28. 60
  29. 20
  30. Acute
  31. 105
  32. 110
  33. Acute
  34. Acute
  35. 150
  36. 90
  37. 90
  38. 150
  39. 60
  40. 60

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