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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 430 · 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 90° and 50°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  4. 4.An angle measures 20°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  5. 5.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  17. 17.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  19. 19.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  20. 20.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  37. 37.An angle measures 150°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  38. 38.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  39. 39.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 45° and 65°. What is the third angle (in degrees)?

Answer key

  1. 220
  2. 75
  3. 25
  4. Acute
  5. 95
  6. 35
  7. 160
  8. 160
  9. 85
  10. 90
  11. 165
  12. 15
  13. 55
  14. Acute
  15. 90
  16. Right
  17. 60
  18. 170
  19. Obtuse
  20. 75
  21. 45
  22. 60
  23. 70
  24. 120
  25. 135
  26. 130
  27. 30
  28. 75
  29. 220
  30. 35
  31. 40
  32. 15
  33. 70
  34. 150
  35. 5
  36. 125
  37. Obtuse
  38. Straight
  39. 140
  40. 70

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