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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 855 · 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.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  2. 2.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  22. 22.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  23. 23.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  27. 27.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  28. 28.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 20° and 25°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 50° and 105°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  40. 40.An angle measures 60°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight

Answer key

  1. Right
  2. 90
  3. 140
  4. 20
  5. 145
  6. 15
  7. 80
  8. 80
  9. 100
  10. 110
  11. 50
  12. 100
  13. 60
  14. 180
  15. 230
  16. 240
  17. 60
  18. 150
  19. 170
  20. 45
  21. 80
  22. Obtuse
  23. 10
  24. 95
  25. 120
  26. 70
  27. Straight
  28. 115
  29. 95
  30. 180
  31. 40
  32. 135
  33. 25
  34. 120
  35. 180
  36. 65
  37. 90
  38. 55
  39. 10
  40. Acute

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