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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 859 · 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 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  2. 2.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  7. 7.An angle measures 105°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  8. 8.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  9. 9.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  10. 10.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  16. 16.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  21. 21.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  22. 22.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 130°. What is the third angle (in degrees)?
  40. 40.An angle measures 20°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse

Answer key

  1. Right
  2. 190
  3. 180
  4. 105
  5. 65
  6. 75
  7. Obtuse
  8. 55
  9. Obtuse
  10. 105
  11. 150
  12. 100
  13. 15
  14. 60
  15. Straight
  16. 160
  17. 25
  18. 60
  19. 170
  20. 180
  21. Obtuse
  22. 150
  23. 45
  24. 60
  25. 160
  26. 35
  27. 25
  28. 75
  29. 75
  30. 30
  31. 120
  32. 110
  33. 220
  34. 75
  35. 5
  36. 85
  37. 150
  38. 70
  39. 25
  40. Acute

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