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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 279 · 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 40° and 100°. What is the third angle (in degrees)?
  2. 2.An angle measures 155°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  3. 3.An angle measures 170°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  4. 4.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  5. 5.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  24. 24.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  26. 26.An angle measures 75°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  27. 27.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  28. 28.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  38. 38.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  39. 39.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?

Answer key

  1. 40
  2. Obtuse
  3. Obtuse
  4. Acute
  5. 65
  6. 120
  7. 120
  8. 105
  9. 125
  10. 30
  11. 90
  12. 5
  13. 160
  14. 70
  15. 110
  16. 85
  17. 150
  18. 90
  19. 25
  20. 30
  21. 150
  22. 145
  23. Straight
  24. 40
  25. 30
  26. Acute
  27. Acute
  28. 130
  29. 55
  30. 210
  31. 130
  32. 60
  33. 190
  34. 130
  35. 70
  36. 220
  37. 35
  38. Acute
  39. 80
  40. 55

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