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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 655 · 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 50°. What is the other angle (in degrees)?
  2. 2.An angle measures 115°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  5. 5.Two angles of a triangle are 35° and 140°. What is the third angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  7. 7.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  8. 8.An angle measures 20°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  9. 9.Two angles of a triangle are 50° and 80°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  13. 13.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  14. 14.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 90° and 60°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  30. 30.An angle measures 95°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  31. 31.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  34. 34.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  35. 35.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  39. 39.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  40. 40.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. Obtuse
  3. 180
  4. Acute
  5. 5
  6. Straight
  7. 170
  8. Acute
  9. 50
  10. 160
  11. 30
  12. 60
  13. Right
  14. 15
  15. 80
  16. 90
  17. 90
  18. 145
  19. 10
  20. 90
  21. 30
  22. 30
  23. 40
  24. 60
  25. 55
  26. 75
  27. 60
  28. 85
  29. 200
  30. Obtuse
  31. 5
  32. 5
  33. 40
  34. Obtuse
  35. Acute
  36. 100
  37. 25
  38. 100
  39. Obtuse
  40. 110

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