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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 305 · 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 40°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  13. 13.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  14. 14.An angle measures 130°. What kind of angle is it? (a) Obtuse (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.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  24. 24.An angle measures 150°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  25. 25.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 70° and 75°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.An angle measures 170°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  34. 34.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  40. 40.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight

Answer key

  1. 50
  2. 135
  3. 150
  4. 120
  5. 60
  6. 55
  7. 145
  8. 120
  9. 70
  10. Straight
  11. 90
  12. Obtuse
  13. 105
  14. Obtuse
  15. 150
  16. 170
  17. 5
  18. 40
  19. 30
  20. 40
  21. 120
  22. 35
  23. 75
  24. Obtuse
  25. 95
  26. 35
  27. 155
  28. 60
  29. 135
  30. 170
  31. 15
  32. 75
  33. Obtuse
  34. 190
  35. 30
  36. 10
  37. 60
  38. 10
  39. 190
  40. Right

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