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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 654 · 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.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 125°. What is the other 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.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  11. 11.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 50° and 90°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  20. 20.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  21. 21.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  24. 24.An angle measures 125°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  25. 25.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  39. 39.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  40. 40.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?

Answer key

  1. 125
  2. 65
  3. 30
  4. 90
  5. 30
  6. 85
  7. 55
  8. 85
  9. 30
  10. Straight
  11. 20
  12. 105
  13. 75
  14. 140
  15. 40
  16. 55
  17. 80
  18. 60
  19. 210
  20. Obtuse
  21. 145
  22. 230
  23. 30
  24. Obtuse
  25. Right
  26. 25
  27. 50
  28. 55
  29. 10
  30. 75
  31. 60
  32. 130
  33. 50
  34. 80
  35. 140
  36. 5
  37. 130
  38. 40
  39. Acute
  40. 40

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