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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 290 · 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 15°. What is the other angle (in degrees)?
  2. 2.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  3. 3.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  6. 6.Two angles of a triangle are 45° and 30°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  17. 17.An angle measures 55°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  18. 18.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  22. 22.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  23. 23.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 20° and 110°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  38. 38.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  39. 39.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?

Answer key

  1. 75
  2. Acute
  3. 125
  4. 40
  5. Right
  6. 105
  7. 90
  8. 30
  9. 50
  10. 150
  11. 155
  12. 120
  13. 180
  14. 100
  15. 110
  16. 25
  17. Acute
  18. 60
  19. 35
  20. 75
  21. 80
  22. Obtuse
  23. 45
  24. 75
  25. 220
  26. 200
  27. 30
  28. 90
  29. 130
  30. 55
  31. 20
  32. 135
  33. 50
  34. 150
  35. 70
  36. 85
  37. 80
  38. Straight
  39. 150
  40. 25

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