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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 790 · 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 5°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  11. 11.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 45° and 70°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  21. 21.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  29. 29.An angle measures 135°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  30. 30.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  31. 31.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  32. 32.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. 85
  2. 50
  3. 60
  4. 100
  5. 55
  6. 150
  7. 170
  8. 120
  9. 100
  10. Straight
  11. 220
  12. 30
  13. 150
  14. 40
  15. 65
  16. 55
  17. 15
  18. 40
  19. 170
  20. 45
  21. Acute
  22. 30
  23. 170
  24. 105
  25. 15
  26. 35
  27. 70
  28. 55
  29. Obtuse
  30. 130
  31. Right
  32. 20
  33. 90
  34. 35
  35. 90
  36. 110
  37. 130
  38. 100
  39. 10
  40. 120

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