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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 642 · 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 90° and 35°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  10. 10.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  11. 11.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  13. 13.An angle measures 60°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  14. 14.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  15. 15.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  16. 16.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  33. 33.An angle measures 150°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  34. 34.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  35. 35.An angle measures 65°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  36. 36.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  38. 38.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  39. 39.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?

Answer key

  1. 55
  2. 170
  3. 25
  4. 145
  5. 80
  6. 60
  7. 45
  8. 20
  9. 150
  10. Acute
  11. 180
  12. 25
  13. Acute
  14. Obtuse
  15. Straight
  16. 35
  17. 130
  18. 15
  19. 60
  20. 60
  21. 25
  22. 155
  23. 10
  24. 30
  25. 100
  26. 85
  27. 120
  28. 220
  29. 50
  30. 100
  31. 150
  32. 90
  33. Obtuse
  34. 25
  35. Acute
  36. 160
  37. 30
  38. Right
  39. 90
  40. 150

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