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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 209 · 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.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  2. 2.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  19. 19.An angle measures 120°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 50° and 105°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  24. 24.An angle measures 170°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  25. 25.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 60°. 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.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  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 95° and 40°. What is the third angle (in degrees)?
  32. 32.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  33. 33.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  39. 39.An angle measures 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  40. 40.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. 140
  3. Straight
  4. 55
  5. 10
  6. 60
  7. 75
  8. 30
  9. 140
  10. 30
  11. 20
  12. 135
  13. 120
  14. 25
  15. 20
  16. 165
  17. 180
  18. 160
  19. Obtuse
  20. 90
  21. 45
  22. 25
  23. 180
  24. Obtuse
  25. 5
  26. 120
  27. 60
  28. 70
  29. 85
  30. 150
  31. 45
  32. Acute
  33. 45
  34. 70
  35. 120
  36. 115
  37. 150
  38. 105
  39. Acute
  40. 115

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