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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 717 · 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.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  18. 18.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  19. 19.An angle measures 170°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  20. 20.An angle measures 25°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  21. 21.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  29. 29.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  30. 30.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  35. 35.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?

Answer key

  1. 200
  2. 65
  3. 25
  4. 75
  5. 90
  6. Obtuse
  7. 170
  8. 35
  9. 115
  10. 165
  11. 85
  12. 70
  13. 55
  14. 190
  15. 15
  16. 70
  17. 15
  18. Acute
  19. Obtuse
  20. Acute
  21. 25
  22. 250
  23. 150
  24. 30
  25. 135
  26. 20
  27. 60
  28. 80
  29. Right
  30. 75
  31. 125
  32. 130
  33. 120
  34. Straight
  35. 120
  36. 100
  37. 240
  38. 55
  39. 140
  40. 180

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