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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 192 · 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 35° and 115°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 35° and 105°. 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 120°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  9. 9.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  10. 10.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 55° and 40°. What is the third 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.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  26. 26.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  27. 27.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  31. 31.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  39. 39.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  40. 40.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 40
  3. 40
  4. 60
  5. 120
  6. 75
  7. 110
  8. Straight
  9. Obtuse
  10. 180
  11. 70
  12. 155
  13. 55
  14. 5
  15. 70
  16. 85
  17. 130
  18. 60
  19. 30
  20. 60
  21. 30
  22. 140
  23. 90
  24. 150
  25. 80
  26. Acute
  27. 40
  28. 200
  29. 60
  30. 45
  31. Right
  32. 30
  33. 180
  34. 90
  35. 170
  36. 135
  37. 70
  38. 200
  39. Acute
  40. 170

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