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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 450 · 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.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  8. 8.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  9. 9.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 45° and 95°. What is the third angle (in degrees)?
  13. 13.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  14. 14.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. 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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  25. 25.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  26. 26.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  27. 27.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  28. 28.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  29. 29.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  31. 31.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  32. 32.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  37. 37.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?

Answer key

  1. 65
  2. 190
  3. 100
  4. 150
  5. 35
  6. 120
  7. 120
  8. Obtuse
  9. 125
  10. 90
  11. 160
  12. 40
  13. Acute
  14. 25
  15. 110
  16. 120
  17. 160
  18. 120
  19. 50
  20. 70
  21. 10
  22. 15
  23. 90
  24. 55
  25. Right
  26. Acute
  27. 15
  28. Straight
  29. 85
  30. 75
  31. Acute
  32. 40
  33. 150
  34. 60
  35. 70
  36. 60
  37. Acute
  38. 5
  39. 80
  40. 65

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