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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 141 · 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 70° and 20°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  15. 15.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  16. 16.An angle measures 20°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  19. 19.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  20. 20.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  22. 22.An angle measures 35°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  23. 23.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 60° and 110°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  27. 27.An angle measures 10°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  28. 28.Two angles of a triangle are 45° and 100°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  34. 34.An angle measures 60°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  35. 35.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?

Answer key

  1. 90
  2. 75
  3. 70
  4. 260
  5. 90
  6. 70
  7. 55
  8. 60
  9. 160
  10. 130
  11. 115
  12. 160
  13. 110
  14. Right
  15. 25
  16. Acute
  17. 30
  18. 80
  19. Acute
  20. 100
  21. 15
  22. Acute
  23. 5
  24. 150
  25. 10
  26. 210
  27. Acute
  28. 35
  29. 30
  30. 85
  31. 30
  32. 15
  33. 80
  34. Acute
  35. 80
  36. 20
  37. 150
  38. 50
  39. 130
  40. 140

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