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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 269 · 40 sums
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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.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  5. 5.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  15. 15.An angle measures 65°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  16. 16.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  17. 17.Two angles of a triangle are 65° and 55°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  19. 19.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  20. 20.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  23. 23.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  24. 24.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  27. 27.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  28. 28.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. 20
  3. 90
  4. Right
  5. 180
  6. 210
  7. 25
  8. 25
  9. 60
  10. 45
  11. 70
  12. 5
  13. 75
  14. 150
  15. Acute
  16. Acute
  17. 60
  18. 25
  19. Acute
  20. 160
  21. 25
  22. 80
  23. Obtuse
  24. 145
  25. 70
  26. 50
  27. Acute
  28. 120
  29. 60
  30. 60
  31. 180
  32. 65
  33. 45
  34. 100
  35. 25
  36. 90
  37. 120
  38. 15
  39. 130
  40. 15

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