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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 763 · 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 65°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 35° and 50°. What is the third 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 80° and 210°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  8. 8.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  9. 9.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  10. 10.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  19. 19.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. 95
  3. 80
  4. 70
  5. 90
  6. 130
  7. Right
  8. 35
  9. Obtuse
  10. 5
  11. 150
  12. 10
  13. 110
  14. 145
  15. 95
  16. 180
  17. 85
  18. Straight
  19. 150
  20. 40
  21. 75
  22. 250
  23. 120
  24. 55
  25. 200
  26. 70
  27. 110
  28. 20
  29. 60
  30. 50
  31. 105
  32. 85
  33. 200
  34. 10
  35. 35
  36. 120
  37. 30
  38. 45
  39. 70
  40. 160

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