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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 420 · 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 25° and 45°. What is the third angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  5. 5.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  11. 11.An angle measures 170°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  12. 12.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 95° and 50°. What is the third angle (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.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  27. 27.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  28. 28.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  29. 29.An angle measures 45°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  30. 30.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?

Answer key

  1. 110
  2. Right
  3. 60
  4. Straight
  5. 50
  6. 160
  7. 70
  8. 50
  9. 20
  10. 160
  11. Obtuse
  12. 200
  13. 60
  14. 10
  15. 35
  16. 80
  17. 75
  18. 130
  19. 150
  20. 65
  21. 55
  22. 130
  23. 150
  24. 60
  25. 50
  26. 90
  27. Acute
  28. 30
  29. Acute
  30. 30
  31. 60
  32. 130
  33. 220
  34. 35
  35. 90
  36. 90
  37. 130
  38. 45
  39. 90
  40. 200

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