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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 18 · 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 110° and 50°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 35° and 90°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  12. 12.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  14. 14.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 20°. 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 together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  33. 33.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  34. 34.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  39. 39.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  40. 40.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?

Answer key

  1. 200
  2. 160
  3. 160
  4. 210
  5. 135
  6. 55
  7. 30
  8. 55
  9. 180
  10. 15
  11. Right
  12. 10
  13. Straight
  14. 15
  15. 170
  16. 20
  17. 120
  18. 140
  19. 40
  20. 220
  21. 60
  22. 35
  23. 10
  24. 190
  25. 120
  26. 30
  27. 150
  28. 160
  29. 60
  30. 155
  31. 170
  32. 80
  33. Acute
  34. Acute
  35. 5
  36. 100
  37. 120
  38. 120
  39. Obtuse
  40. 100

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