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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 847 · 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) Straight (b) Obtuse (c) Acute
  2. 2.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  6. 6.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  15. 15.An angle measures 160°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  16. 16.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  21. 21.An angle measures 170°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  22. 22.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  32. 32.An angle measures 85°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  33. 33.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 35
  3. 65
  4. 60
  5. 15
  6. Acute
  7. 70
  8. 65
  9. 5
  10. Right
  11. 180
  12. 60
  13. 120
  14. 60
  15. Obtuse
  16. 55
  17. 80
  18. 10
  19. 70
  20. 210
  21. Obtuse
  22. 10
  23. 40
  24. 85
  25. 35
  26. 90
  27. 90
  28. 150
  29. 150
  30. 50
  31. 85
  32. Acute
  33. 150
  34. 20
  35. 40
  36. 75
  37. 90
  38. 120
  39. 170
  40. 40

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