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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 746 · 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.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  3. 3.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  4. 4.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  8. 8.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  9. 9.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  15. 15.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  16. 16.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  21. 21.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  22. 22.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  32. 32.An angle measures 120°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  33. 33.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  34. 34.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  35. 35.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?

Answer key

  1. 100
  2. 140
  3. Obtuse
  4. 5
  5. 50
  6. 120
  7. 60
  8. Obtuse
  9. 60
  10. 240
  11. 80
  12. 60
  13. 105
  14. 125
  15. Obtuse
  16. 5
  17. 35
  18. 30
  19. 45
  20. 15
  21. Acute
  22. 165
  23. Straight
  24. 120
  25. 130
  26. 70
  27. 160
  28. 170
  29. 180
  30. 85
  31. 115
  32. Obtuse
  33. Obtuse
  34. Right
  35. 80
  36. 90
  37. 40
  38. 5
  39. 35
  40. 60

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