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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 657 · 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 of a triangle are 65° and 75°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  4. 4.Two angles of a triangle are 20° and 45°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  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 together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 70° and 75°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  29. 29.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  30. 30.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (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 1 o'clock (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. 30
  3. Right
  4. 115
  5. 60
  6. 220
  7. 170
  8. 65
  9. 110
  10. 40
  11. 20
  12. 25
  13. 15
  14. 15
  15. 90
  16. 120
  17. 70
  18. 100
  19. 90
  20. 95
  21. 35
  22. 110
  23. 60
  24. 35
  25. 140
  26. 125
  27. 100
  28. 50
  29. Straight
  30. 150
  31. 70
  32. 55
  33. 70
  34. 30
  35. 150
  36. 30
  37. 70
  38. 35
  39. 170
  40. 160

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