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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 860 · 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.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  4. 4.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  6. 6.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  19. 19.An angle measures 80°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  20. 20.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 60° and 90°. What is the third angle (in degrees)?
  27. 27.An angle measures 150°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  28. 28.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  31. 31.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  32. 32.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?

Answer key

  1. 200
  2. 95
  3. 5
  4. Obtuse
  5. Right
  6. 115
  7. 65
  8. 120
  9. 15
  10. 5
  11. 90
  12. 80
  13. 140
  14. 120
  15. 65
  16. 45
  17. 30
  18. 125
  19. Acute
  20. 65
  21. 25
  22. 140
  23. 240
  24. 110
  25. 70
  26. 30
  27. Obtuse
  28. 10
  29. 140
  30. 60
  31. Straight
  32. 150
  33. 90
  34. 20
  35. 45
  36. 85
  37. 20
  38. 30
  39. 200
  40. 35

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