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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 245 · 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 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  2. 2.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  3. 3.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 45° and 110°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 60° and 50°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 35° and 110°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  32. 32.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  33. 33.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  35. 35.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  36. 36.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  40. 40.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight

Answer key

  1. Straight
  2. Acute
  3. 230
  4. 25
  5. 105
  6. 90
  7. 70
  8. 90
  9. 10
  10. 60
  11. 70
  12. 170
  13. 105
  14. 15
  15. 70
  16. 35
  17. 150
  18. 230
  19. 120
  20. 130
  21. 80
  22. 50
  23. 150
  24. 25
  25. 125
  26. 20
  27. 160
  28. 55
  29. 120
  30. 165
  31. 55
  32. Right
  33. 40
  34. 85
  35. Acute
  36. 60
  37. 110
  38. 40
  39. 70
  40. Obtuse

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