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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 664 · 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 6 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  12. 12.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  17. 17.An angle measures 110°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  25. 25.An angle measures 135°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  26. 26.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  27. 27.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  30. 30.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  31. 31.An angle measures 170°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  32. 32.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 80°. What is the other 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. 180
  2. 60
  3. 10
  4. 45
  5. 90
  6. 50
  7. 80
  8. 20
  9. 110
  10. 90
  11. Straight
  12. 65
  13. 200
  14. 250
  15. 170
  16. 30
  17. Obtuse
  18. 150
  19. 125
  20. 30
  21. 35
  22. 120
  23. 70
  24. 25
  25. Obtuse
  26. Right
  27. 85
  28. 155
  29. 10
  30. Acute
  31. Obtuse
  32. 55
  33. 150
  34. 75
  35. 210
  36. 60
  37. 20
  38. 230
  39. 100
  40. 60

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