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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 261 · 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 40°. What is the other angle (in degrees)?
  2. 2.An angle measures 70°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  3. 3.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  4. 4.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  6. 6.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  18. 18.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 135°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  31. 31.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  32. 32.Two angles of a triangle are 50° and 110°. What is the third 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.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  38. 38.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  39. 39.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?

Answer key

  1. 140
  2. Acute
  3. Acute
  4. 5
  5. Right
  6. 110
  7. 180
  8. 25
  9. 65
  10. 35
  11. 35
  12. 30
  13. 15
  14. 65
  15. 160
  16. 30
  17. Straight
  18. 100
  19. 90
  20. 35
  21. 30
  22. 125
  23. 15
  24. 65
  25. 85
  26. 70
  27. 55
  28. 135
  29. 165
  30. 5
  31. Obtuse
  32. 20
  33. 25
  34. 200
  35. 110
  36. 60
  37. 150
  38. Obtuse
  39. 120
  40. 200

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