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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 348 · 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 120° and 80°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 130°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  9. 9.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  20. 20.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  21. 21.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  23. 23.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 20° and 95°. What is the third angle (in degrees)?
  33. 33.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  34. 34.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  36. 36.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  37. 37.An angle measures 100°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  38. 38.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  39. 39.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  40. 40.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?

Answer key

  1. 160
  2. 85
  3. 30
  4. 60
  5. 55
  6. 150
  7. 60
  8. Straight
  9. 150
  10. 120
  11. 80
  12. 55
  13. 70
  14. 110
  15. 120
  16. 150
  17. 160
  18. 80
  19. 15
  20. Acute
  21. 60
  22. Right
  23. 50
  24. 160
  25. 120
  26. 170
  27. 130
  28. 60
  29. 60
  30. 20
  31. 35
  32. 65
  33. Acute
  34. 55
  35. 75
  36. Acute
  37. Obtuse
  38. 15
  39. Acute
  40. 170

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