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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 583 · 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 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  2. 2.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  7. 7.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 60° and 110°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 75° and 60°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  26. 26.An angle measures 120°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  27. 27.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  32. 32.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  33. 33.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 35
  3. 35
  4. 130
  5. 25
  6. Right
  7. 45
  8. 180
  9. 150
  10. 230
  11. 110
  12. 45
  13. 180
  14. 70
  15. 120
  16. 140
  17. 115
  18. 10
  19. 90
  20. 45
  21. 150
  22. 80
  23. 220
  24. 110
  25. 35
  26. Obtuse
  27. 45
  28. 60
  29. 20
  30. 80
  31. 50
  32. Acute
  33. 160
  34. 155
  35. 5
  36. 85
  37. 80
  38. 40
  39. 130
  40. 65

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