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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 920 · 40 sums
TalentJR

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) Right (b) Acute (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  6. 6.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 70° and 55°. What is the third 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.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  17. 17.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  18. 18.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  20. 20.Two angles of a triangle are 50° and 95°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 20° and 75°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  32. 32.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  33. 33.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 25° and 150°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?

Answer key

  1. Obtuse
  2. 170
  3. 95
  4. 70
  5. Straight
  6. 70
  7. 110
  8. 80
  9. 70
  10. 90
  11. 170
  12. 55
  13. 50
  14. 75
  15. 5
  16. 35
  17. Obtuse
  18. 75
  19. Right
  20. 35
  21. 140
  22. 210
  23. 160
  24. 120
  25. 65
  26. 145
  27. 25
  28. 85
  29. 85
  30. 30
  31. 100
  32. Obtuse
  33. 30
  34. 30
  35. 120
  36. 160
  37. 5
  38. 165
  39. 30
  40. 40

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