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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 428 · 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 90° and 70°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  8. 8.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  9. 9.An angle measures 150°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  10. 10.An angle measures 60°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  12. 12.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  23. 23.An angle measures 165°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  24. 24.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?

Answer key

  1. 200
  2. 70
  3. 155
  4. 130
  5. 120
  6. 110
  7. Straight
  8. 70
  9. Obtuse
  10. Acute
  11. Right
  12. 160
  13. 60
  14. 40
  15. 65
  16. 90
  17. 85
  18. 50
  19. 90
  20. 90
  21. 30
  22. 190
  23. Obtuse
  24. 120
  25. 35
  26. 60
  27. 80
  28. 55
  29. 120
  30. 25
  31. 5
  32. 105
  33. 70
  34. 170
  35. 180
  36. 40
  37. 30
  38. 90
  39. 20
  40. 240

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