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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 569 · 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.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  4. 4.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  13. 13.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  14. 14.Two angles of a triangle are 40° and 30°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  18. 18.An angle measures 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  19. 19.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  20. 20.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  21. 21.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  25. 25.An angle measures 130°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  26. 26.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  35. 35.An angle measures 55°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  36. 36.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. 40
  3. Right
  4. 80
  5. 160
  6. 15
  7. 150
  8. 45
  9. 65
  10. 150
  11. 110
  12. 140
  13. Obtuse
  14. 110
  15. 20
  16. 35
  17. 75
  18. Obtuse
  19. Acute
  20. Obtuse
  21. 125
  22. 45
  23. 60
  24. 130
  25. Obtuse
  26. 55
  27. 170
  28. 160
  29. 60
  30. 65
  31. 150
  32. 150
  33. 80
  34. 80
  35. Acute
  36. 25
  37. 165
  38. 50
  39. 120
  40. 60

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