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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 102 · 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 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  2. 2.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 65° and 80°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  18. 18.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  19. 19.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  20. 20.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  29. 29.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  30. 30.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  32. 32.An angle measures 10°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.An angle measures 155°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  35. 35.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  38. 38.An angle measures 25°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  39. 39.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 85
  3. 150
  4. 40
  5. 80
  6. 90
  7. 35
  8. 150
  9. 160
  10. 120
  11. 200
  12. 60
  13. 55
  14. 35
  15. 60
  16. 40
  17. 30
  18. Acute
  19. Right
  20. 50
  21. 5
  22. 165
  23. 60
  24. 120
  25. 75
  26. 110
  27. 140
  28. 30
  29. Acute
  30. 170
  31. 50
  32. Acute
  33. 120
  34. Obtuse
  35. 75
  36. 85
  37. 55
  38. Acute
  39. 80
  40. 60

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