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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 658 · 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.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 25° and 140°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 10°. What is the other 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 140°. 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.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  19. 19.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  23. 23.An angle measures 170°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  24. 24.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  30. 30.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  31. 31.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  32. 32.An angle measures 85°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  33. 33.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. 15
  3. 85
  4. 30
  5. 35
  6. 80
  7. 150
  8. 45
  9. 80
  10. 90
  11. 40
  12. 70
  13. 45
  14. 30
  15. 160
  16. 30
  17. 30
  18. Straight
  19. 240
  20. 20
  21. 60
  22. 70
  23. Obtuse
  24. 85
  25. 30
  26. 10
  27. 130
  28. 75
  29. 190
  30. Acute
  31. 30
  32. Acute
  33. 165
  34. 90
  35. 75
  36. 65
  37. 110
  38. 45
  39. 120
  40. 65

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