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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 388 · 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 175°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  2. 2.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  10. 10.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  18. 18.An angle measures 150°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  19. 19.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  25. 25.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  38. 38.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  39. 39.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 35
  3. 160
  4. 10
  5. 170
  6. 150
  7. 140
  8. 230
  9. Right
  10. 130
  11. 210
  12. 230
  13. 25
  14. 155
  15. 200
  16. 5
  17. 200
  18. Obtuse
  19. Acute
  20. 65
  21. 140
  22. 55
  23. 30
  24. 60
  25. Straight
  26. 120
  27. 55
  28. 25
  29. 150
  30. 120
  31. 65
  32. 60
  33. 40
  34. 45
  35. 75
  36. 10
  37. 40
  38. Acute
  39. 85
  40. 130

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