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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 78 · 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 105°. What is the other angle (in degrees)?
  2. 2.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  3. 3.An angle measures 95°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  4. 4.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  7. 7.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 25° and 130°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  14. 14.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  15. 15.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  17. 17.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  18. 18.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  27. 27.An angle measures 65°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  28. 28.Two angles of a triangle are 60° and 110°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?

Answer key

  1. 75
  2. Acute
  3. Obtuse
  4. 10
  5. 100
  6. Right
  7. 110
  8. 60
  9. 75
  10. 70
  11. 90
  12. 25
  13. 80
  14. Straight
  15. 75
  16. 155
  17. Obtuse
  18. 25
  19. 110
  20. 35
  21. 50
  22. 60
  23. 170
  24. 125
  25. 35
  26. 10
  27. Acute
  28. 10
  29. 145
  30. 40
  31. 120
  32. 90
  33. 50
  34. 60
  35. 120
  36. 30
  37. 90
  38. 70
  39. 50
  40. 100

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