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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 253 · 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.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  6. 6.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  8. 8.An angle measures 50°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  9. 9.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?
  11. 11.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  12. 12.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  13. 13.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  14. 14.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  19. 19.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  22. 22.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  27. 27.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  28. 28.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  33. 33.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 95
  3. 60
  4. 15
  5. 150
  6. Acute
  7. 145
  8. Acute
  9. 70
  10. 15
  11. Obtuse
  12. 80
  13. Acute
  14. 115
  15. 90
  16. 40
  17. 45
  18. Acute
  19. 110
  20. 85
  21. Straight
  22. 230
  23. 90
  24. 240
  25. 200
  26. 15
  27. Right
  28. 140
  29. 105
  30. 55
  31. 180
  32. Acute
  33. 95
  34. 150
  35. 135
  36. 160
  37. 60
  38. 130
  39. 65
  40. 150

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