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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 784 · 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 85°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  16. 16.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  17. 17.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  18. 18.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  22. 22.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  37. 37.An angle measures 10°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  38. 38.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?

Answer key

  1. 5
  2. 20
  3. 45
  4. 75
  5. 40
  6. 90
  7. 140
  8. 100
  9. 140
  10. 70
  11. 140
  12. 75
  13. 150
  14. 70
  15. Straight
  16. 70
  17. Obtuse
  18. 85
  19. 160
  20. 125
  21. Right
  22. 90
  23. 60
  24. 160
  25. 50
  26. 80
  27. 25
  28. 170
  29. 115
  30. 125
  31. 120
  32. 55
  33. 115
  34. 60
  35. 60
  36. 170
  37. Acute
  38. 130
  39. 65
  40. 70

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