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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 775 · 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 20° and 125°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  7. 7.An angle measures 110°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  8. 8.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  9. 9.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  10. 10.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  11. 11.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  12. 12.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  13. 13.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  16. 16.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  24. 24.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  25. 25.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  34. 34.An angle measures 120°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  35. 35.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  38. 38.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  39. 39.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. 35
  2. 50
  3. 60
  4. 75
  5. 40
  6. 20
  7. Obtuse
  8. Acute
  9. 150
  10. Acute
  11. 55
  12. Obtuse
  13. 70
  14. 60
  15. Straight
  16. 15
  17. 30
  18. 75
  19. 110
  20. 35
  21. 80
  22. 35
  23. 90
  24. Right
  25. 60
  26. 30
  27. 130
  28. 30
  29. 70
  30. 180
  31. 70
  32. 160
  33. 100
  34. Obtuse
  35. 90
  36. 60
  37. 60
  38. Obtuse
  39. 150
  40. 120

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