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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 87 · 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 together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  3. 3.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  20. 20.An angle measures 170°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  21. 21.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  24. 24.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  25. 25.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  28. 28.An angle measures 10°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  29. 29.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  31. 31.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  40. 40.An angle measures 150°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse

Answer key

  1. 170
  2. Right
  3. 120
  4. 25
  5. 60
  6. 30
  7. 60
  8. 55
  9. 65
  10. 90
  11. 30
  12. 20
  13. 10
  14. 50
  15. 165
  16. 80
  17. 110
  18. 55
  19. Straight
  20. Obtuse
  21. 40
  22. 35
  23. Obtuse
  24. Acute
  25. 200
  26. 125
  27. 85
  28. Acute
  29. 150
  30. 35
  31. Acute
  32. 85
  33. 180
  34. 50
  35. 190
  36. 95
  37. 10
  38. 210
  39. 130
  40. Obtuse

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