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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 223 · 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.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  7. 7.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  13. 13.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 30° and 90°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.An angle measures 85°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  32. 32.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  33. 33.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  39. 39.An angle measures 20°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  40. 40.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?

Answer key

  1. 85
  2. 90
  3. 95
  4. 150
  5. 15
  6. Straight
  7. 120
  8. 80
  9. 100
  10. 60
  11. 60
  12. Right
  13. 90
  14. 35
  15. 30
  16. 120
  17. 65
  18. 140
  19. 120
  20. 25
  21. 5
  22. 50
  23. 110
  24. 45
  25. 165
  26. 35
  27. 15
  28. 35
  29. 60
  30. 120
  31. Acute
  32. Acute
  33. 50
  34. 105
  35. 35
  36. 30
  37. 65
  38. 75
  39. Acute
  40. 55

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