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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 452 · 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 30° and 135°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  6. 6.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.An angle measures 135°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  8. 8.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  22. 22.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  23. 23.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  37. 37.An angle measures 10°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  38. 38.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?

Answer key

  1. 150
  2. 15
  3. 65
  4. 170
  5. Straight
  6. Right
  7. Obtuse
  8. 155
  9. 210
  10. 120
  11. 120
  12. 110
  13. 90
  14. 130
  15. 180
  16. 70
  17. 30
  18. Acute
  19. 30
  20. 70
  21. 220
  22. Acute
  23. 80
  24. 70
  25. 40
  26. 55
  27. 60
  28. 30
  29. 35
  30. 25
  31. 150
  32. 80
  33. 50
  34. 55
  35. 65
  36. 10
  37. Acute
  38. 160
  39. 40
  40. 35

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