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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 786 · 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.A right angle is split into two angles. One of them is 20°. 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 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  4. 4.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  5. 5.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  6. 6.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 130° and 150°. 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.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 35° and 130°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  23. 23.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 65°. What is the third angle (in degrees)?
  25. 25.An angle measures 120°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  40. 40.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse

Answer key

  1. 70
  2. 80
  3. Acute
  4. 150
  5. Obtuse
  6. 190
  7. 150
  8. 160
  9. 210
  10. 80
  11. 35
  12. 160
  13. 170
  14. 75
  15. 55
  16. 70
  17. 80
  18. 10
  19. 85
  20. 15
  21. 105
  22. Right
  23. 55
  24. 95
  25. Obtuse
  26. 110
  27. 65
  28. 20
  29. 60
  30. 10
  31. 45
  32. 35
  33. 55
  34. 40
  35. 160
  36. 60
  37. 30
  38. 170
  39. 190
  40. Straight

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