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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 865 · 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.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  2. 2.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  4. 4.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  13. 13.An angle measures 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  14. 14.An angle measures 35°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  15. 15.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  21. 21.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  22. 22.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  29. 29.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  30. 30.An angle measures 75°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  31. 31.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  33. 33.An angle measures 145°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  34. 34.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 150
  3. Right
  4. 165
  5. 15
  6. 15
  7. 10
  8. 180
  9. 150
  10. 80
  11. 45
  12. 35
  13. Acute
  14. Acute
  15. 10
  16. 90
  17. 120
  18. 70
  19. 15
  20. 5
  21. Straight
  22. 40
  23. 105
  24. 120
  25. 45
  26. 65
  27. 60
  28. 120
  29. Acute
  30. Acute
  31. 150
  32. 20
  33. Obtuse
  34. 120
  35. 200
  36. 170
  37. 150
  38. 80
  39. 75
  40. 25

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