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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 836 · 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 65°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  8. 8.An angle measures 140°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  9. 9.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  12. 12.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  23. 23.An angle measures 20°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  24. 24.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  27. 27.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  28. 28.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  33. 33.An angle measures 145°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  34. 34.Three angles meet at a point. Two of them are 90° and 90°. 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 of a triangle are 60° and 40°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 15
  3. 50
  4. 170
  5. 145
  6. 55
  7. 150
  8. Obtuse
  9. 30
  10. 75
  11. Straight
  12. 135
  13. 120
  14. 140
  15. 125
  16. 220
  17. 155
  18. 70
  19. 75
  20. 5
  21. 60
  22. 90
  23. Acute
  24. 240
  25. 180
  26. 60
  27. Right
  28. 10
  29. 25
  30. 5
  31. 120
  32. 210
  33. Obtuse
  34. 180
  35. 165
  36. 80
  37. 60
  38. 55
  39. 30
  40. 240

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