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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 644 · 40 sums
TalentJR

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 together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  4. 4.An angle measures 30°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  5. 5.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  8. 8.Two angles of a triangle are 30° and 125°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  11. 11.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  12. 12.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  16. 16.An angle measures 165°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  17. 17.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  18. 18.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  31. 31.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  40. 40.An angle measures 80°. What kind of angle is it? (a) Right (b) Acute (c) Straight

Answer key

  1. 160
  2. 30
  3. 85
  4. Acute
  5. 30
  6. 40
  7. Right
  8. 25
  9. 75
  10. 55
  11. Acute
  12. 25
  13. 65
  14. 145
  15. 170
  16. Obtuse
  17. Obtuse
  18. 80
  19. 30
  20. 120
  21. 50
  22. 35
  23. 120
  24. 90
  25. 80
  26. 20
  27. 180
  28. 110
  29. 20
  30. Straight
  31. 150
  32. 10
  33. 35
  34. 5
  35. 70
  36. 160
  37. 140
  38. 125
  39. 120
  40. Acute

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