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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 392 · 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) Obtuse (b) Straight (c) Right
  2. 2.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  5. 5.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  9. 9.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  10. 10.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  16. 16.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  17. 17.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  23. 23.An angle measures 50°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  26. 26.An angle measures 170°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  27. 27.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  28. 28.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  32. 32.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  33. 33.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  34. 34.An angle measures 20°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  35. 35.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 170
  3. 90
  4. Obtuse
  5. 60
  6. 30
  7. 100
  8. 150
  9. Acute
  10. 20
  11. 45
  12. 135
  13. 60
  14. 95
  15. 55
  16. Obtuse
  17. 110
  18. 100
  19. 110
  20. 45
  21. 45
  22. 30
  23. Acute
  24. 125
  25. 80
  26. Obtuse
  27. Right
  28. 170
  29. 50
  30. 40
  31. 30
  32. Acute
  33. 160
  34. Acute
  35. 155
  36. 150
  37. 120
  38. 200
  39. 90
  40. 250

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