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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 111 · 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.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  7. 7.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  13. 13.An angle measures 45°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  14. 14.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 35° and 40°. What is the third angle (in degrees)?
  19. 19.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  20. 20.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  24. 24.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  28. 28.An angle measures 155°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  29. 29.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 40° and 60°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  35. 35.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  36. 36.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  37. 37.An angle measures 165°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  38. 38.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?

Answer key

  1. 60
  2. 160
  3. 45
  4. 50
  5. 10
  6. 80
  7. Acute
  8. 90
  9. 170
  10. 30
  11. 190
  12. 55
  13. Acute
  14. 110
  15. 95
  16. 45
  17. 90
  18. 105
  19. Acute
  20. 60
  21. 55
  22. 85
  23. Right
  24. 60
  25. 100
  26. 55
  27. 180
  28. Obtuse
  29. 35
  30. 120
  31. 40
  32. 80
  33. 50
  34. 100
  35. Straight
  36. 5
  37. Obtuse
  38. 170
  39. 30
  40. 105

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