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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 479 · 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.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  2. 2.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  9. 9.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  14. 14.An angle measures 50°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  15. 15.An angle measures 55°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  16. 16.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  21. 21.An angle measures 120°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  22. 22.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 20° and 50°. 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 20° and 20°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  38. 38.An angle measures 115°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  39. 39.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 25
  3. 230
  4. 40
  5. 30
  6. 75
  7. 10
  8. Right
  9. 80
  10. 100
  11. 25
  12. 70
  13. 210
  14. Acute
  15. Acute
  16. 100
  17. 200
  18. 140
  19. 65
  20. 90
  21. Obtuse
  22. 165
  23. 30
  24. 110
  25. 45
  26. 140
  27. 170
  28. 10
  29. 190
  30. 120
  31. 135
  32. 140
  33. 35
  34. 30
  35. 110
  36. 20
  37. 150
  38. Obtuse
  39. 150
  40. 150

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