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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 606 · 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.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  4. 4.An angle measures 150°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  5. 5.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  7. 7.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  13. 13.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  14. 14.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  23. 23.An angle measures 30°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  24. 24.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  25. 25.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 40° and 40°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.An angle measures 105°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  34. 34.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 35° and 80°. What is the third angle (in degrees)?
  36. 36.An angle measures 135°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  37. 37.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?

Answer key

  1. 125
  2. 50
  3. 115
  4. Obtuse
  5. 130
  6. 150
  7. Obtuse
  8. 90
  9. 140
  10. 35
  11. 120
  12. 45
  13. Obtuse
  14. 20
  15. 155
  16. 60
  17. 25
  18. 45
  19. 10
  20. 100
  21. 170
  22. 90
  23. Acute
  24. Straight
  25. 85
  26. 70
  27. 30
  28. 120
  29. 60
  30. 100
  31. 60
  32. 75
  33. Obtuse
  34. 180
  35. 65
  36. Obtuse
  37. 30
  38. 120
  39. 80
  40. 85

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