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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 299 · 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 of a triangle are 65° and 20°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  3. 3.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  4. 4.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  13. 13.An angle measures 30°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  14. 14.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  21. 21.An angle measures 160°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  22. 22.Two angles of a triangle are 45° and 125°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  26. 26.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  27. 27.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  28. 28.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  29. 29.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  36. 36.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  37. 37.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?

Answer key

  1. 95
  2. 25
  3. Obtuse
  4. 180
  5. 60
  6. 70
  7. 30
  8. 125
  9. 120
  10. 35
  11. 60
  12. 80
  13. Acute
  14. 150
  15. 10
  16. 45
  17. 150
  18. 35
  19. 65
  20. 25
  21. Obtuse
  22. 10
  23. 70
  24. 115
  25. 100
  26. Acute
  27. 95
  28. Straight
  29. 100
  30. 90
  31. 240
  32. 190
  33. 150
  34. 20
  35. 160
  36. Right
  37. 170
  38. 15
  39. 140
  40. 110

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