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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 412 · 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 of a triangle are 80° and 60°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  4. 4.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  5. 5.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  13. 13.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 45° and 130°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 50°. 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 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  32. 32.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  35. 35.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  36. 36.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  37. 37.A right angle is split into two angles. 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 150°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. 40
  2. 5
  3. 70
  4. Acute
  5. 95
  6. 85
  7. 50
  8. 125
  9. 20
  10. 90
  11. 150
  12. 30
  13. Obtuse
  14. 70
  15. 65
  16. 200
  17. 155
  18. 45
  19. 90
  20. 20
  21. 15
  22. 5
  23. 35
  24. 25
  25. 130
  26. 75
  27. 85
  28. 160
  29. 200
  30. 120
  31. Acute
  32. 80
  33. 65
  34. 50
  35. Obtuse
  36. Right
  37. 60
  38. 30
  39. 10
  40. 120

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