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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 73 · 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 175°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  2. 2.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 50° and 105°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  10. 10.An angle measures 105°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 25° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  23. 23.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  24. 24.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  28. 28.An angle measures 55°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  29. 29.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  35. 35.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  36. 36.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  37. 37.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  38. 38.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?

Answer key

  1. Obtuse
  2. 30
  3. 30
  4. 125
  5. 150
  6. 35
  7. 25
  8. 70
  9. Right
  10. Obtuse
  11. 135
  12. 85
  13. 55
  14. 25
  15. 125
  16. 85
  17. 50
  18. 75
  19. 75
  20. 120
  21. 160
  22. 40
  23. Acute
  24. 155
  25. 5
  26. 20
  27. 5
  28. Acute
  29. 80
  30. 15
  31. 115
  32. 170
  33. 60
  34. 170
  35. Obtuse
  36. 150
  37. Obtuse
  38. 100
  39. 70
  40. 120

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