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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 19 · 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 75° and 70°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  5. 5.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  7. 7.An angle measures 65°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  8. 8.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  12. 12.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  19. 19.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  20. 20.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  25. 25.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  26. 26.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  28. 28.An angle measures 135°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  29. 29.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  30. 30.An angle measures 30°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  31. 31.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  35. 35.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  36. 36.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  37. 37.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  38. 38.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?

Answer key

  1. 35
  2. 160
  3. 190
  4. Right
  5. 170
  6. 95
  7. Acute
  8. 55
  9. 180
  10. 60
  11. Straight
  12. 140
  13. 155
  14. 5
  15. 170
  16. 130
  17. 120
  18. 20
  19. Acute
  20. 85
  21. 60
  22. 35
  23. 25
  24. 70
  25. Obtuse
  26. 20
  27. 5
  28. Obtuse
  29. Acute
  30. Acute
  31. Acute
  32. 85
  33. 60
  34. 75
  35. Acute
  36. 10
  37. Obtuse
  38. 95
  39. 120
  40. 140

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