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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 396 · 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.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  3. 3.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  4. 4.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  6. 6.An angle measures 65°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  7. 7.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  15. 15.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  18. 18.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  19. 19.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  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 80°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  24. 24.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  25. 25.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  29. 29.An angle measures 145°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  30. 30.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.An angle measures 170°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  34. 34.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?

Answer key

  1. 80
  2. 45
  3. Acute
  4. 165
  5. 10
  6. Acute
  7. 35
  8. 80
  9. 120
  10. 75
  11. 65
  12. 25
  13. 65
  14. Right
  15. 150
  16. 140
  17. 140
  18. Acute
  19. 150
  20. Straight
  21. 30
  22. 100
  23. 95
  24. Obtuse
  25. 140
  26. 20
  27. 230
  28. 120
  29. Obtuse
  30. 30
  31. 180
  32. 55
  33. Obtuse
  34. 50
  35. 80
  36. 30
  37. 60
  38. 100
  39. 130
  40. 10

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