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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 135 · 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 100° and 55°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  3. 3.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  6. 6.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 40° and 95°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  14. 14.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  15. 15.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  23. 23.An angle measures 130°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  24. 24.An angle measures 170°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  25. 25.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 30° and 55°. What is the third 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 50° and 100°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  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 100° and 20°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  36. 36.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  37. 37.An angle measures 85°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  38. 38.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  39. 39.Two angles of a triangle are 25° and 70°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. Straight
  3. 30
  4. 120
  5. Right
  6. 90
  7. 75
  8. 45
  9. 150
  10. 5
  11. 70
  12. 180
  13. 10
  14. Obtuse
  15. 130
  16. 70
  17. 105
  18. 65
  19. 90
  20. 130
  21. 15
  22. 10
  23. Obtuse
  24. Obtuse
  25. 160
  26. 160
  27. 90
  28. 95
  29. 75
  30. 210
  31. 200
  32. 140
  33. 165
  34. 60
  35. 65
  36. Acute
  37. Acute
  38. Acute
  39. 85
  40. 55

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