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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 314 · 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 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  2. 2.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  3. 3.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  4. 4.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 80°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  25. 25.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  27. 27.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 60°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  33. 33.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  34. 34.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  35. 35.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 95° and 45°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 105
  3. Acute
  4. 75
  5. 30
  6. 30
  7. 30
  8. 45
  9. 90
  10. 170
  11. 110
  12. 55
  13. 55
  14. 65
  15. 80
  16. 140
  17. 35
  18. 120
  19. 5
  20. 160
  21. 160
  22. 150
  23. 40
  24. 70
  25. Obtuse
  26. Acute
  27. 80
  28. 30
  29. 60
  30. 120
  31. 25
  32. 70
  33. Right
  34. Acute
  35. 150
  36. 40
  37. 220
  38. 125
  39. 110
  40. 130

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