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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 354 · 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 80°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  2. 2.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  3. 3.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  5. 5.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  16. 16.An angle measures 45°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  17. 17.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  27. 27.An angle measures 110°. 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.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  34. 34.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  35. 35.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 155
  3. Obtuse
  4. Straight
  5. 125
  6. 75
  7. 60
  8. 70
  9. 90
  10. 200
  11. 25
  12. 75
  13. 130
  14. 70
  15. 60
  16. Acute
  17. 70
  18. 110
  19. 20
  20. 90
  21. 100
  22. 15
  23. 50
  24. 180
  25. 20
  26. 135
  27. Obtuse
  28. 120
  29. 110
  30. 150
  31. 75
  32. 170
  33. 45
  34. Right
  35. 120
  36. 110
  37. 115
  38. 100
  39. 60
  40. 15

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