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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 395 · 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 45° and 115°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  5. 5.An angle measures 20°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  6. 6.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?
  7. 7.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  8. 8.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  22. 22.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 25° and 70°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  34. 34.An angle measures 85°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?

Answer key

  1. 20
  2. 90
  3. 70
  4. Right
  5. Acute
  6. 80
  7. Acute
  8. 80
  9. 40
  10. 120
  11. 150
  12. 50
  13. 170
  14. 75
  15. 85
  16. 20
  17. 10
  18. 170
  19. 20
  20. 120
  21. Straight
  22. 160
  23. 150
  24. 150
  25. 70
  26. 10
  27. 85
  28. 135
  29. 60
  30. 15
  31. 70
  32. 85
  33. 30
  34. Acute
  35. 80
  36. 45
  37. 120
  38. 110
  39. 160
  40. 100

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