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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 869 · 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 30°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  2. 2.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  3. 3.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 20°. What is the other 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.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  9. 9.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 25° and 80°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  28. 28.An angle measures 125°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  30. 30.An angle measures 130°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  31. 31.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  35. 35.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. Right
  3. 60
  4. 160
  5. 10
  6. 65
  7. 65
  8. 25
  9. Obtuse
  10. 170
  11. 5
  12. 190
  13. 75
  14. 75
  15. 45
  16. 90
  17. 30
  18. 55
  19. 130
  20. 30
  21. 170
  22. 95
  23. 20
  24. 150
  25. 100
  26. 80
  27. 85
  28. Obtuse
  29. 60
  30. Obtuse
  31. 60
  32. 100
  33. 150
  34. 20
  35. Acute
  36. 220
  37. 60
  38. 115
  39. 120
  40. 45

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