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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 721 · 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 60°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  2. 2.Two angles of a triangle are 30° and 135°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.An angle measures 95°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  8. 8.An angle measures 150°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  9. 9.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  11. 11.An angle measures 30°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  12. 12.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  16. 16.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 25° and 80°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 60° and 85°. What is the third angle (in degrees)?
  23. 23.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  28. 28.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  29. 29.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 15
  3. 85
  4. 30
  5. 150
  6. 75
  7. Obtuse
  8. Obtuse
  9. 130
  10. 90
  11. Acute
  12. 55
  13. 150
  14. 20
  15. Straight
  16. 5
  17. 150
  18. 25
  19. 10
  20. 110
  21. 75
  22. 35
  23. Obtuse
  24. 60
  25. 100
  26. 180
  27. 75
  28. Right
  29. 80
  30. 125
  31. 25
  32. 80
  33. 90
  34. 55
  35. 165
  36. 160
  37. 65
  38. 95
  39. 100
  40. 110

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