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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 323 · 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.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  3. 3.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 55°. What is the other angle (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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  12. 12.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  16. 16.An angle measures 125°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  17. 17.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  31. 31.An angle measures 60°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  32. 32.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  33. 33.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  34. 34.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  38. 38.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  39. 39.An angle measures 120°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  40. 40.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. Right
  3. 10
  4. 125
  5. 45
  6. 90
  7. 10
  8. 65
  9. 85
  10. 25
  11. Straight
  12. 40
  13. 170
  14. 110
  15. 150
  16. Obtuse
  17. 25
  18. 140
  19. 110
  20. 140
  21. 80
  22. 105
  23. 85
  24. 150
  25. 30
  26. 65
  27. 90
  28. 120
  29. 110
  30. 170
  31. Acute
  32. 50
  33. Acute
  34. 165
  35. 50
  36. 105
  37. 120
  38. Acute
  39. Obtuse
  40. 90

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