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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 183 · 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 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.Two angles of a triangle are 70° and 100°. What is the third angle (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.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  6. 6.An angle measures 155°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  7. 7.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  16. 16.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  17. 17.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  20. 20.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  21. 21.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  34. 34.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  35. 35.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  36. 36.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  37. 37.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  38. 38.An angle measures 130°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  39. 39.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  40. 40.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight

Answer key

  1. Acute
  2. 10
  3. 85
  4. 25
  5. 200
  6. Obtuse
  7. 45
  8. 20
  9. 85
  10. 20
  11. 160
  12. 55
  13. 150
  14. 80
  15. 90
  16. Acute
  17. 150
  18. 60
  19. 35
  20. Acute
  21. 130
  22. 100
  23. 20
  24. 140
  25. 140
  26. 25
  27. 150
  28. 150
  29. 55
  30. 80
  31. 90
  32. 115
  33. 25
  34. Obtuse
  35. 140
  36. Acute
  37. Right
  38. Obtuse
  39. 180
  40. Straight

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