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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 264 · 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.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  5. 5.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 25° and 75°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  12. 12.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  13. 13.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  14. 14.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  15. 15.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 85° and 80°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  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 25° and 20°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  25. 25.An angle measures 125°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  26. 26.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  33. 33.An angle measures 170°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  34. 34.An angle measures 110°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  35. 35.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  36. 36.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?

Answer key

  1. 50
  2. 75
  3. 155
  4. Straight
  5. 60
  6. 45
  7. 120
  8. 80
  9. 20
  10. 220
  11. Right
  12. 130
  13. Obtuse
  14. Acute
  15. 25
  16. 15
  17. 10
  18. 165
  19. 70
  20. 135
  21. 40
  22. 30
  23. 150
  24. 15
  25. Obtuse
  26. 5
  27. 60
  28. 70
  29. 35
  30. 80
  31. 120
  32. 45
  33. Obtuse
  34. Obtuse
  35. Acute
  36. 110
  37. 35
  38. 30
  39. 160
  40. 85

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