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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 803 · 40 sums
TalentJR

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.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  4. 4.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  22. 22.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  23. 23.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  36. 36.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  37. 37.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?

Answer key

  1. 85
  2. 15
  3. Right
  4. 65
  5. 30
  6. 170
  7. 30
  8. 155
  9. 60
  10. Straight
  11. 95
  12. 70
  13. 75
  14. 20
  15. 50
  16. 50
  17. 210
  18. 130
  19. 170
  20. 45
  21. 115
  22. Obtuse
  23. 20
  24. 100
  25. 75
  26. 35
  27. 180
  28. 30
  29. 110
  30. 90
  31. 130
  32. 55
  33. 90
  34. 15
  35. 50
  36. Acute
  37. 50
  38. 210
  39. 145
  40. 150

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