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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 346 · 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) Obtuse (b) Right (c) Straight
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  9. 9.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  10. 10.An angle measures 45°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  11. 11.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  18. 18.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  19. 19.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 80°. What is the other angle (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 of a triangle are 20° and 85°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  34. 34.An angle measures 65°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  35. 35.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  36. 36.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  37. 37.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 135
  3. 80
  4. 80
  5. 20
  6. 55
  7. 100
  8. Right
  9. 40
  10. Acute
  11. 160
  12. 90
  13. 85
  14. 90
  15. 190
  16. 75
  17. 160
  18. Obtuse
  19. 30
  20. 10
  21. 30
  22. 75
  23. 90
  24. 90
  25. 150
  26. 70
  27. 105
  28. 10
  29. 170
  30. 160
  31. 50
  32. 5
  33. 15
  34. Acute
  35. 105
  36. Acute
  37. 120
  38. 40
  39. 55
  40. 240

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