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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 222 · 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.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  3. 3.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  6. 6.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  15. 15.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  16. 16.An angle measures 45°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  17. 17.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  28. 28.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  29. 29.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  30. 30.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  31. 31.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 20° and 155°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?

Answer key

  1. 160
  2. Straight
  3. 10
  4. 50
  5. 170
  6. Acute
  7. 60
  8. 120
  9. 200
  10. 85
  11. 55
  12. 25
  13. 70
  14. 65
  15. Right
  16. Acute
  17. 60
  18. 90
  19. 65
  20. 170
  21. 45
  22. 55
  23. 85
  24. 50
  25. 120
  26. 40
  27. 75
  28. Acute
  29. 65
  30. Obtuse
  31. 140
  32. 115
  33. 45
  34. 40
  35. 15
  36. 5
  37. 75
  38. 110
  39. 50
  40. 120

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