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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 364 · 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.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  2. 2.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  7. 7.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 50° and 30°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  16. 16.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  17. 17.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  24. 24.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  25. 25.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  29. 29.An angle measures 165°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  30. 30.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  32. 32.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  35. 35.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  39. 39.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  40. 40.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 40
  3. 190
  4. 85
  5. 50
  6. 20
  7. Obtuse
  8. 180
  9. 85
  10. 150
  11. 30
  12. 110
  13. 220
  14. 100
  15. 120
  16. Straight
  17. 160
  18. 120
  19. 60
  20. 170
  21. 90
  22. 30
  23. Right
  24. Acute
  25. 110
  26. 200
  27. 10
  28. 70
  29. Obtuse
  30. 60
  31. 220
  32. Acute
  33. 120
  34. Acute
  35. 75
  36. 55
  37. 5
  38. 45
  39. Acute
  40. 120

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