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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 975 · 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 155°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  5. 5.An angle measures 120°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.An angle measures 140°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  8. 8.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  9. 9.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  12. 12.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  25. 25.An angle measures 175°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  26. 26.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  35. 35.An angle measures 135°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 65° and 55°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. 115
  3. 170
  4. 60
  5. Obtuse
  6. 75
  7. Obtuse
  8. Straight
  9. 85
  10. 85
  11. Right
  12. 60
  13. 120
  14. 60
  15. 90
  16. 60
  17. 70
  18. 35
  19. 65
  20. 110
  21. 70
  22. 5
  23. 130
  24. 80
  25. Obtuse
  26. 155
  27. 65
  28. 170
  29. 90
  30. 20
  31. 150
  32. 200
  33. 45
  34. 130
  35. Obtuse
  36. 90
  37. 120
  38. 125
  39. 120
  40. 60

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