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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 385 · 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 30°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  5. 5.An angle measures 125°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  6. 6.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 60° and 95°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  10. 10.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  11. 11.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  21. 21.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  22. 22.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?

Answer key

  1. Acute
  2. 135
  3. 15
  4. 85
  5. Obtuse
  6. 60
  7. 25
  8. 110
  9. 90
  10. Obtuse
  11. 45
  12. 75
  13. 170
  14. 155
  15. 120
  16. 150
  17. 160
  18. 80
  19. 115
  20. Straight
  21. Right
  22. 55
  23. 5
  24. 60
  25. 70
  26. 120
  27. 65
  28. 30
  29. 30
  30. 30
  31. 60
  32. 15
  33. 140
  34. 30
  35. 45
  36. 120
  37. 150
  38. 125
  39. 10
  40. 150

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