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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 330 · 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 together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  4. 4.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  5. 5.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  9. 9.An angle measures 140°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  10. 10.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  11. 11.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  12. 12.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  14. 14.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  15. 15.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  16. 16.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  23. 23.An angle measures 65°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  28. 28.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  29. 29.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  30. 30.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  40. 40.An angle measures 160°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse

Answer key

  1. 35
  2. 230
  3. 35
  4. Acute
  5. 120
  6. 60
  7. 85
  8. 65
  9. Obtuse
  10. 95
  11. Acute
  12. 45
  13. 60
  14. Acute
  15. Acute
  16. 75
  17. 30
  18. 70
  19. 150
  20. 5
  21. 80
  22. 130
  23. Acute
  24. 100
  25. 25
  26. 20
  27. 180
  28. Acute
  29. Straight
  30. 120
  31. 180
  32. 70
  33. 80
  34. 10
  35. 65
  36. 30
  37. 50
  38. 180
  39. 65
  40. Obtuse

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