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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 335 · 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 110°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 40° and 30°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 55°. 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.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  16. 16.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  20. 20.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  24. 24.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  25. 25.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  30. 30.An angle measures 130°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  31. 31.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  32. 32.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 60° and 35°. What is the third angle (in degrees)?
  34. 34.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  35. 35.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. 100
  3. 50
  4. 70
  5. 95
  6. 110
  7. 25
  8. 85
  9. 110
  10. 10
  11. 30
  12. 125
  13. 155
  14. 75
  15. Straight
  16. 30
  17. 35
  18. 190
  19. Right
  20. 45
  21. 5
  22. 120
  23. 100
  24. Obtuse
  25. 180
  26. 90
  27. 110
  28. 40
  29. 80
  30. Obtuse
  31. Obtuse
  32. 70
  33. 85
  34. Acute
  35. 65
  36. 60
  37. 80
  38. 10
  39. 135
  40. 40

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