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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 426 · 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.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  3. 3.An angle measures 115°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  4. 4.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  8. 8.An angle measures 70°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  9. 9.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  11. 11.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  14. 14.An angle measures 10°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  16. 16.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  17. 17.An angle measures 20°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  18. 18.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 95°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 45° and 100°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?

Answer key

  1. 15
  2. 160
  3. Obtuse
  4. Straight
  5. 90
  6. 110
  7. 20
  8. Acute
  9. 30
  10. Right
  11. 110
  12. 80
  13. 140
  14. Acute
  15. 60
  16. Obtuse
  17. Acute
  18. 120
  19. 15
  20. 5
  21. 30
  22. 60
  23. 70
  24. 65
  25. 75
  26. 80
  27. 50
  28. 90
  29. 150
  30. 230
  31. 35
  32. 125
  33. 130
  34. 60
  35. 170
  36. 230
  37. 40
  38. 45
  39. 65
  40. 55

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