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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 716 · 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 65°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  14. 14.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  15. 15.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 50° and 120°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  36. 36.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  37. 37.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  38. 38.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  39. 39.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  40. 40.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. 30
  3. 30
  4. 150
  5. 45
  6. 25
  7. 35
  8. 95
  9. 40
  10. 60
  11. Right
  12. 120
  13. 200
  14. Acute
  15. 170
  16. 180
  17. 70
  18. 190
  19. 35
  20. 100
  21. 5
  22. 135
  23. 200
  24. 150
  25. 150
  26. 90
  27. 25
  28. 30
  29. 35
  30. 60
  31. 150
  32. 60
  33. 110
  34. 10
  35. 65
  36. Acute
  37. 75
  38. Obtuse
  39. Obtuse
  40. 95

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