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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 197 · 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 together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  8. 8.An angle measures 95°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  9. 9.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  24. 24.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  25. 25.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  31. 31.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  34. 34.An angle measures 75°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  35. 35.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?

Answer key

  1. 140
  2. 40
  3. 45
  4. 10
  5. 135
  6. 75
  7. Right
  8. Obtuse
  9. 130
  10. 30
  11. 230
  12. 250
  13. 30
  14. 150
  15. 40
  16. 50
  17. 150
  18. 60
  19. 25
  20. 20
  21. 20
  22. 70
  23. 90
  24. Obtuse
  25. 230
  26. 90
  27. 100
  28. 15
  29. 15
  30. Straight
  31. 55
  32. 70
  33. 20
  34. Acute
  35. 140
  36. 65
  37. 45
  38. 70
  39. 140
  40. 90

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