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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 806 · 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 20° and 135°. What is the third angle (in degrees)?
  2. 2.An angle measures 15°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  3. 3.An angle measures 135°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  4. 4.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  6. 6.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  7. 7.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  10. 10.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  25. 25.An angle measures 60°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  26. 26.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  27. 27.An angle measures 110°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  28. 28.An angle measures 100°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  29. 29.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. Acute
  3. Obtuse
  4. 45
  5. 80
  6. Obtuse
  7. 155
  8. 60
  9. 135
  10. Acute
  11. 150
  12. 200
  13. 15
  14. 190
  15. 70
  16. 160
  17. 85
  18. 105
  19. 60
  20. Right
  21. 30
  22. 25
  23. 130
  24. 180
  25. Acute
  26. 120
  27. Obtuse
  28. Obtuse
  29. 60
  30. 30
  31. 75
  32. 160
  33. 65
  34. 120
  35. 165
  36. 35
  37. 10
  38. 40
  39. 60
  40. 45

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