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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 756 · 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 10°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 90° and 60°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  7. 7.An angle measures 115°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  8. 8.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  11. 11.An angle measures 130°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  12. 12.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  16. 16.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  27. 27.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  28. 28.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  29. 29.An angle measures 150°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  30. 30.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  34. 34.An angle measures 175°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.An angle measures 70°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  37. 37.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 75° and 90°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?

Answer key

  1. 170
  2. 90
  3. 120
  4. 30
  5. 40
  6. 65
  7. Obtuse
  8. 150
  9. 45
  10. 50
  11. Obtuse
  12. 40
  13. 95
  14. 155
  15. Straight
  16. 120
  17. 100
  18. 35
  19. 90
  20. 170
  21. 160
  22. 110
  23. 150
  24. 180
  25. 160
  26. 150
  27. Right
  28. 110
  29. Obtuse
  30. 70
  31. 60
  32. 115
  33. 125
  34. Obtuse
  35. 50
  36. Acute
  37. 90
  38. 15
  39. 15
  40. 60

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