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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 45 · 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.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  7. 7.An angle measures 75°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  8. 8.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  14. 14.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  15. 15.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  18. 18.An angle measures 130°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  19. 19.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  22. 22.Two angles of a triangle are 25° and 70°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  28. 28.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  29. 29.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  30. 30.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  31. 31.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  32. 32.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  38. 38.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  39. 39.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?

Answer key

  1. 210
  2. 30
  3. 5
  4. 240
  5. 40
  6. 85
  7. Acute
  8. 55
  9. 20
  10. 130
  11. 140
  12. 150
  13. 25
  14. Obtuse
  15. 45
  16. 200
  17. 110
  18. Obtuse
  19. 10
  20. 120
  21. Right
  22. 85
  23. 65
  24. 20
  25. 120
  26. 10
  27. 45
  28. Obtuse
  29. 70
  30. Acute
  31. Acute
  32. 170
  33. 15
  34. 90
  35. 40
  36. 150
  37. 150
  38. Acute
  39. 5
  40. 120

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