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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 232 · 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 30° and 30°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  9. 9.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 30° and 80°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  19. 19.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 40° and 95°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  32. 32.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  33. 33.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  34. 34.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  35. 35.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  40. 40.An angle measures 130°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight

Answer key

  1. 120
  2. 60
  3. 100
  4. 140
  5. 150
  6. 150
  7. 120
  8. Straight
  9. 135
  10. 85
  11. 35
  12. 95
  13. 70
  14. 160
  15. 5
  16. 180
  17. 30
  18. Acute
  19. 90
  20. 60
  21. 85
  22. 120
  23. 150
  24. 190
  25. 190
  26. 150
  27. 170
  28. 40
  29. 45
  30. 65
  31. 60
  32. Right
  33. 80
  34. Acute
  35. 110
  36. 20
  37. 45
  38. 165
  39. 70
  40. Obtuse

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