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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 884 · 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 50° and 100°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  4. 4.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 85° and 20°. 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 of a triangle are 30° and 80°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  12. 12.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  13. 13.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  16. 16.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  17. 17.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  18. 18.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  19. 19.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  20. 20.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  21. 21.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 40°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  33. 33.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  34. 34.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 70° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?

Answer key

  1. 30
  2. 130
  3. Right
  4. 10
  5. 60
  6. 75
  7. 150
  8. 70
  9. 30
  10. 35
  11. 70
  12. Acute
  13. 120
  14. 90
  15. 100
  16. Obtuse
  17. Straight
  18. Obtuse
  19. Obtuse
  20. 50
  21. Acute
  22. 85
  23. 60
  24. 260
  25. 50
  26. 190
  27. 150
  28. 105
  29. 70
  30. 70
  31. 80
  32. 105
  33. Acute
  34. 190
  35. 130
  36. 50
  37. 65
  38. 35
  39. 5
  40. 180

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