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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 315 · 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 120°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  14. 14.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  19. 19.An angle measures 30°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  20. 20.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 70° and 75°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  29. 29.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  30. 30.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 45° and 65°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 60° and 35°. What is the third angle (in degrees)?
  40. 40.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse

Answer key

  1. 60
  2. 90
  3. 25
  4. 120
  5. 60
  6. 165
  7. 65
  8. 85
  9. 220
  10. 20
  11. 40
  12. 15
  13. Straight
  14. 50
  15. 95
  16. 70
  17. 35
  18. Acute
  19. Acute
  20. 35
  21. 90
  22. 55
  23. 35
  24. 90
  25. 140
  26. 200
  27. 180
  28. 50
  29. Right
  30. 5
  31. 90
  32. 65
  33. 30
  34. 150
  35. 70
  36. 150
  37. 45
  38. 145
  39. 85
  40. Acute

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