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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 542 · 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 145°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  11. 11.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  15. 15.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  16. 16.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  17. 17.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 55° and 100°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  36. 36.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  37. 37.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 65
  3. Obtuse
  4. 20
  5. 150
  6. 30
  7. 10
  8. 35
  9. 50
  10. Right
  11. 40
  12. 40
  13. 120
  14. Straight
  15. 20
  16. Obtuse
  17. 40
  18. 35
  19. 90
  20. 105
  21. 30
  22. 160
  23. 65
  24. 25
  25. 55
  26. 80
  27. 90
  28. 25
  29. 125
  30. 50
  31. 85
  32. 240
  33. 65
  34. 5
  35. 165
  36. Acute
  37. 150
  38. 55
  39. 45
  40. 90

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