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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 890 · 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 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  5. 5.An angle measures 145°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  6. 6.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  16. 16.An angle measures 115°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  17. 17.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  18. 18.Two angles of a triangle are 45° and 20°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  25. 25.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  26. 26.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  27. 27.An angle measures 120°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  28. 28.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 35° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  37. 37.An angle measures 25°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  38. 38.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. 140
  3. 45
  4. 30
  5. Obtuse
  6. 30
  7. 25
  8. 150
  9. 105
  10. 60
  11. 45
  12. 220
  13. 105
  14. 100
  15. 60
  16. Obtuse
  17. Acute
  18. 115
  19. 180
  20. 120
  21. 65
  22. 90
  23. 120
  24. 50
  25. Obtuse
  26. Acute
  27. Obtuse
  28. 45
  29. 145
  30. 150
  31. 15
  32. 55
  33. 70
  34. 30
  35. 55
  36. 95
  37. Acute
  38. 10
  39. 200
  40. 230

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