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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 825 · 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 50°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  13. 13.An angle measures 45°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  14. 14.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  15. 15.An angle measures 30°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  16. 16.An angle measures 140°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  17. 17.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 60° and 180°. 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.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 80° and 65°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 25° and 70°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 20° and 80°. What is the third angle (in degrees)?
  36. 36.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  37. 37.Two angles of a triangle are 20° and 70°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?

Answer key

  1. 130
  2. 125
  3. 190
  4. 65
  5. 180
  6. 110
  7. 60
  8. 50
  9. 60
  10. 75
  11. 90
  12. 100
  13. Acute
  14. Right
  15. Acute
  16. Obtuse
  17. 60
  18. 160
  19. 90
  20. 120
  21. 140
  22. 60
  23. 150
  24. 35
  25. 85
  26. 160
  27. 90
  28. 10
  29. 200
  30. 100
  31. 60
  32. 170
  33. 120
  34. 55
  35. 80
  36. Acute
  37. 90
  38. 190
  39. 120
  40. 60

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