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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 631 · 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 3 o'clock (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  3. 3.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  4. 4.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  6. 6.An angle measures 135°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  7. 7.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  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 20°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 50° and 80°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 40° and 85°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  32. 32.An angle measures 150°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  33. 33.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 45°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?

Answer key

  1. 90
  2. Straight
  3. Obtuse
  4. 160
  5. 100
  6. Obtuse
  7. 180
  8. Right
  9. 120
  10. 70
  11. 50
  12. 180
  13. 35
  14. 10
  15. 60
  16. 125
  17. 60
  18. 55
  19. 5
  20. 65
  21. 120
  22. 60
  23. 45
  24. 90
  25. 50
  26. 120
  27. 75
  28. 80
  29. 15
  30. 180
  31. 60
  32. Obtuse
  33. 20
  34. 65
  35. 85
  36. 30
  37. 50
  38. 115
  39. 220
  40. 25

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