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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 199 · 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) Straight (b) Right (c) Acute
  2. 2.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  3. 3.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  9. 9.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  10. 10.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  11. 11.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  22. 22.An angle measures 160°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  23. 23.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  24. 24.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. Right
  3. 150
  4. 5
  5. 130
  6. 50
  7. 75
  8. 60
  9. Obtuse
  10. 40
  11. Obtuse
  12. 10
  13. 180
  14. 170
  15. 10
  16. 130
  17. 140
  18. 130
  19. 155
  20. 20
  21. 90
  22. Obtuse
  23. Straight
  24. 35
  25. 150
  26. 10
  27. 90
  28. 70
  29. 55
  30. 45
  31. 150
  32. 15
  33. 55
  34. 20
  35. 110
  36. 165
  37. 75
  38. 60
  39. 70
  40. 150

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