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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 213 · 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 together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  5. 5.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  13. 13.An angle measures 100°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  14. 14.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  16. 16.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  17. 17.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  35. 35.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  36. 36.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 15°. 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.Two angles of a triangle are 40° and 40°. What is the third angle (in degrees)?

Answer key

  1. 20
  2. Right
  3. 10
  4. Straight
  5. 140
  6. 180
  7. 80
  8. 70
  9. 60
  10. 30
  11. 90
  12. 60
  13. Obtuse
  14. 85
  15. 35
  16. Obtuse
  17. 60
  18. 60
  19. 80
  20. 30
  21. 70
  22. 30
  23. 10
  24. 5
  25. 150
  26. 40
  27. 130
  28. 90
  29. 15
  30. 45
  31. 30
  32. 100
  33. 130
  34. 150
  35. Acute
  36. 20
  37. 10
  38. 165
  39. 120
  40. 100

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