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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 808 · 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.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 65° and 55°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 35° and 130°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 50° and 120°. What is the third angle (in degrees)?
  7. 7.An angle measures 115°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  8. 8.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  10. 10.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  14. 14.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  19. 19.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  23. 23.An angle measures 15°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  24. 24.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  27. 27.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  28. 28.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  33. 33.An angle measures 175°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  34. 34.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  39. 39.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. 120
  2. 60
  3. 150
  4. 65
  5. 15
  6. 10
  7. Obtuse
  8. 95
  9. 75
  10. Acute
  11. 10
  12. 15
  13. Straight
  14. 15
  15. 60
  16. 60
  17. 25
  18. Right
  19. 70
  20. 5
  21. 35
  22. 30
  23. Acute
  24. 140
  25. 20
  26. 145
  27. Acute
  28. 35
  29. 5
  30. 210
  31. 10
  32. 50
  33. Obtuse
  34. 95
  35. 40
  36. 65
  37. 100
  38. 85
  39. Acute
  40. 90

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