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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 41 · 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.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  2. 2.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  9. 9.An angle measures 60°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  10. 10.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  16. 16.An angle measures 155°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  17. 17.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  19. 19.An angle measures 45°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  20. 20.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  25. 25.An angle measures 75°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  26. 26.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  27. 27.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  28. 28.An angle measures 115°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  29. 29.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  33. 33.An angle measures 150°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  34. 34.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  36. 36.An angle measures 110°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  37. 37.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  38. 38.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  39. 39.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  40. 40.An angle measures 80°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse

Answer key

  1. 100
  2. Obtuse
  3. 35
  4. 155
  5. 55
  6. 110
  7. 70
  8. 140
  9. Acute
  10. 85
  11. 170
  12. 60
  13. 35
  14. 60
  15. 120
  16. Obtuse
  17. 10
  18. 180
  19. Acute
  20. 90
  21. 35
  22. 60
  23. 85
  24. 65
  25. Acute
  26. Right
  27. 70
  28. Obtuse
  29. 50
  30. 150
  31. 90
  32. 100
  33. Obtuse
  34. 70
  35. 60
  36. Obtuse
  37. 20
  38. Obtuse
  39. 30
  40. Acute

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