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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 853 · 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) Right (b) Straight (c) Obtuse
  2. 2.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  10. 10.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  16. 16.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  17. 17.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  18. 18.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (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.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  29. 29.An angle measures 60°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  30. 30.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  37. 37.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 85° and 85°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. Straight
  2. 85
  3. 50
  4. 75
  5. 120
  6. 60
  7. 70
  8. 170
  9. Right
  10. 230
  11. 25
  12. 75
  13. 50
  14. 155
  15. Obtuse
  16. 200
  17. Obtuse
  18. 35
  19. 40
  20. 115
  21. 230
  22. 160
  23. 190
  24. 110
  25. 110
  26. 95
  27. 120
  28. 45
  29. Acute
  30. 25
  31. 10
  32. 45
  33. 90
  34. 150
  35. 30
  36. 90
  37. Acute
  38. 120
  39. 10
  40. 90

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