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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 324 · 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 together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  4. 4.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  6. 6.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  7. 7.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  8. 8.An angle measures 150°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  9. 9.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  15. 15.An angle measures 170°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  16. 16.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 80° and 65°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  27. 27.An angle measures 60°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  28. 28.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  35. 35.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?

Answer key

  1. 100
  2. 80
  3. Right
  4. 170
  5. Straight
  6. 110
  7. Acute
  8. Obtuse
  9. 120
  10. 55
  11. 55
  12. 180
  13. 120
  14. 180
  15. Obtuse
  16. 90
  17. 65
  18. 40
  19. 130
  20. 80
  21. 20
  22. 130
  23. 30
  24. 35
  25. 120
  26. 45
  27. Acute
  28. 60
  29. 130
  30. 140
  31. 180
  32. 130
  33. 150
  34. Acute
  35. 150
  36. 10
  37. 90
  38. 105
  39. 70
  40. 10

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