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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 750 · 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 30° and 95°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  14. 14.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  15. 15.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 70° and 70°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  26. 26.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  27. 27.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  29. 29.An angle measures 95°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  30. 30.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  31. 31.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  32. 32.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  33. 33.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  34. 34.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 85° and 55°. What is the third angle (in degrees)?
  39. 39.An angle measures 45°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  40. 40.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?

Answer key

  1. 55
  2. 40
  3. 210
  4. 210
  5. 100
  6. 15
  7. 150
  8. 5
  9. 5
  10. 100
  11. 170
  12. 15
  13. 80
  14. Straight
  15. 60
  16. 65
  17. 220
  18. 90
  19. 140
  20. 40
  21. 190
  22. 40
  23. 50
  24. 130
  25. 30
  26. Acute
  27. 130
  28. 65
  29. Obtuse
  30. 220
  31. Acute
  32. 160
  33. Right
  34. 150
  35. 30
  36. 140
  37. 115
  38. 40
  39. Acute
  40. 5

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