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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 819 · 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 15°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  5. 5.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 95° and 45°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  8. 8.An angle measures 125°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  9. 9.An angle measures 140°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  10. 10.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  20. 20.An angle measures 135°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  21. 21.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  28. 28.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  29. 29.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  38. 38.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  39. 39.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?

Answer key

  1. 165
  2. 80
  3. 100
  4. Right
  5. 150
  6. 40
  7. 90
  8. Obtuse
  9. Obtuse
  10. 40
  11. 55
  12. 20
  13. 15
  14. 150
  15. 150
  16. 30
  17. 150
  18. 180
  19. 55
  20. Obtuse
  21. 85
  22. 220
  23. 100
  24. 65
  25. 60
  26. 70
  27. 40
  28. Straight
  29. 140
  30. 95
  31. 155
  32. 30
  33. 70
  34. 60
  35. 40
  36. 50
  37. 35
  38. Acute
  39. 60
  40. 210

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