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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 369 · 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) Obtuse (b) Acute (c) Right
  2. 2.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  3. 3.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 7 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.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  26. 26.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  27. 27.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  31. 31.An angle measures 135°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 25° and 150°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  37. 37.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  38. 38.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. Straight
  3. 100
  4. 60
  5. 150
  6. 70
  7. 45
  8. 130
  9. 120
  10. 60
  11. 90
  12. 150
  13. 10
  14. 170
  15. 30
  16. 80
  17. 115
  18. 30
  19. 140
  20. 45
  21. 40
  22. 5
  23. 120
  24. 130
  25. 250
  26. Acute
  27. 55
  28. 90
  29. 90
  30. 20
  31. Obtuse
  32. 110
  33. 5
  34. 130
  35. 60
  36. 35
  37. Acute
  38. 30
  39. 180
  40. 50

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