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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 732 · 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 155°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  2. 2.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  6. 6.An angle measures 85°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  10. 10.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  13. 13.An angle measures 55°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  14. 14.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 95° and 45°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  19. 19.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 40° and 60°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  32. 32.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  33. 33.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 125
  3. 25
  4. 35
  5. 190
  6. Acute
  7. 75
  8. 120
  9. Right
  10. 15
  11. 45
  12. 10
  13. Acute
  14. 75
  15. 60
  16. 40
  17. 80
  18. Straight
  19. 85
  20. 80
  21. 80
  22. 140
  23. 30
  24. 160
  25. 90
  26. 30
  27. 45
  28. 120
  29. 35
  30. 240
  31. 140
  32. Acute
  33. 150
  34. 65
  35. 80
  36. 60
  37. 70
  38. 60
  39. 170
  40. 80

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