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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 662 · 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 together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.An angle measures 115°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  10. 10.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 45° and 30°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  21. 21.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  22. 22.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  24. 24.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  38. 38.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  39. 39.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 170
  2. 30
  3. 20
  4. 5
  5. 165
  6. 40
  7. 220
  8. 30
  9. Obtuse
  10. 60
  11. 105
  12. 130
  13. 100
  14. 5
  15. 180
  16. 80
  17. 90
  18. 180
  19. 50
  20. 70
  21. Acute
  22. 95
  23. Straight
  24. 145
  25. 15
  26. 80
  27. 75
  28. 65
  29. 75
  30. 160
  31. 120
  32. 40
  33. 140
  34. 150
  35. 85
  36. 150
  37. 75
  38. Acute
  39. 60
  40. 125

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