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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 678 · 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 100°. What is the other angle (in degrees)?
  2. 2.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  3. 3.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  7. 7.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 35°. 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.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  28. 28.An angle measures 65°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  29. 29.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  33. 33.An angle measures 160°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  34. 34.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  36. 36.An angle measures 85°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  37. 37.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?

Answer key

  1. 80
  2. Acute
  3. 5
  4. 155
  5. 85
  6. Straight
  7. 25
  8. 190
  9. 55
  10. 15
  11. 170
  12. 60
  13. 10
  14. 110
  15. 95
  16. 60
  17. 30
  18. 25
  19. 120
  20. 125
  21. 70
  22. 120
  23. 70
  24. 80
  25. 30
  26. 15
  27. 60
  28. Acute
  29. 140
  30. 95
  31. 25
  32. 40
  33. Obtuse
  34. 120
  35. 65
  36. Acute
  37. 20
  38. 130
  39. 5
  40. 90

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