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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 319 · 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 70° and 70°. What is the third angle (in degrees)?
  2. 2.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  3. 3.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  5. 5.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  6. 6.An angle measures 55°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  7. 7.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  9. 9.Two angles of a triangle are 40° and 30°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  15. 15.Two angles of a triangle are 60° and 50°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 35° and 100°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  23. 23.An angle measures 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  24. 24.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?

Answer key

  1. 40
  2. Obtuse
  3. 75
  4. Straight
  5. 190
  6. Acute
  7. 70
  8. Right
  9. 110
  10. 170
  11. 90
  12. 65
  13. 150
  14. Acute
  15. 70
  16. 30
  17. 15
  18. 130
  19. 45
  20. 180
  21. 80
  22. 80
  23. Obtuse
  24. 190
  25. 70
  26. 60
  27. 60
  28. 50
  29. 155
  30. 80
  31. 165
  32. 60
  33. 35
  34. 210
  35. 70
  36. 190
  37. 100
  38. 120
  39. 25
  40. 55

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