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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 11 · 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 130° and 50°. What is the third angle (in degrees)?
  2. 2.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  3. 3.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 20° and 65°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 1 o'clock (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.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 85° and 65°. What is the third angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. 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 155°. 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.An angle measures 135°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  19. 19.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  21. 21.Two angles of a triangle are 50° and 90°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  23. 23.An angle measures 50°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  24. 24.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  25. 25.An angle measures 120°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.An angle measures 100°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  27. 27.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  35. 35.An angle measures 95°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  36. 36.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?

Answer key

  1. 180
  2. Acute
  3. 85
  4. 95
  5. 40
  6. 170
  7. 30
  8. 140
  9. 150
  10. 30
  11. Right
  12. 100
  13. 60
  14. 10
  15. 5
  16. 25
  17. 130
  18. Obtuse
  19. 70
  20. Straight
  21. 40
  22. 115
  23. Acute
  24. 60
  25. Obtuse
  26. Obtuse
  27. 95
  28. 75
  29. 180
  30. 110
  31. 60
  32. 90
  33. 30
  34. 60
  35. Obtuse
  36. 5
  37. 65
  38. 90
  39. 50
  40. 20

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