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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 373 · 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 150° and 100°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  7. 7.An angle measures 15°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  8. 8.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  10. 10.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  17. 17.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 60° and 90°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  31. 31.An angle measures 110°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  32. 32.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  33. 33.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  34. 34.An angle measures 50°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 50° and 115°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?

Answer key

  1. 110
  2. 250
  3. 40
  4. 150
  5. 180
  6. 90
  7. Acute
  8. 85
  9. Straight
  10. 125
  11. 200
  12. 110
  13. 120
  14. 15
  15. 105
  16. Right
  17. 60
  18. 70
  19. 35
  20. 15
  21. 30
  22. 45
  23. 110
  24. 60
  25. 45
  26. 30
  27. 10
  28. 5
  29. 140
  30. 10
  31. Obtuse
  32. Acute
  33. 165
  34. Acute
  35. 150
  36. 90
  37. 15
  38. 95
  39. 30
  40. 80

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