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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 448 · 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 10°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  2. 2.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 20° and 155°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  8. 8.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  9. 9.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  11. 11.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  12. 12.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  17. 17.An angle measures 30°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  18. 18.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  22. 22.An angle measures 150°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  23. 23.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  28. 28.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  29. 29.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  30. 30.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  31. 31.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  33. 33.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  34. 34.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. 35
  3. 90
  4. 20
  5. 5
  6. 60
  7. 135
  8. Acute
  9. 150
  10. Right
  11. Straight
  12. 160
  13. 80
  14. 35
  15. 80
  16. 20
  17. Acute
  18. 45
  19. 30
  20. 120
  21. 130
  22. Obtuse
  23. 45
  24. 75
  25. 55
  26. 90
  27. 150
  28. Acute
  29. 25
  30. Acute
  31. 5
  32. 200
  33. Obtuse
  34. 60
  35. 160
  36. 15
  37. 85
  38. 120
  39. 105
  40. 90

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