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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 24 · 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 80°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  5. 5.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  6. 6.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  7. 7.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  8. 8.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  22. 22.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  23. 23.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  34. 34.An angle measures 55°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  35. 35.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?

Answer key

  1. 10
  2. 250
  3. 90
  4. Right
  5. 30
  6. Acute
  7. Acute
  8. 75
  9. 180
  10. 50
  11. 20
  12. 120
  13. 130
  14. 135
  15. 55
  16. 120
  17. 60
  18. 150
  19. 240
  20. 150
  21. 230
  22. Straight
  23. 50
  24. 125
  25. 120
  26. 80
  27. 150
  28. 25
  29. 60
  30. 50
  31. 120
  32. 50
  33. 130
  34. Acute
  35. 150
  36. 55
  37. 150
  38. 20
  39. 220
  40. 60

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