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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 650 · 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 45°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  4. 4.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  5. 5.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  9. 9.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  10. 10.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  13. 13.An angle measures 25°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  22. 22.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  23. 23.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 70° and 70°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  31. 31.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  35. 35.An angle measures 135°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  36. 36.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  38. 38.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  39. 39.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 160
  3. 80
  4. Acute
  5. 60
  6. 115
  7. 60
  8. 40
  9. Acute
  10. 150
  11. 50
  12. 150
  13. Acute
  14. 100
  15. 25
  16. 190
  17. 75
  18. 110
  19. 15
  20. 120
  21. 10
  22. Straight
  23. Right
  24. 85
  25. 155
  26. 30
  27. 40
  28. 45
  29. 140
  30. 100
  31. Obtuse
  32. 60
  33. 35
  34. 140
  35. Obtuse
  36. 90
  37. 90
  38. Acute
  39. 40
  40. 210

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