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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 792 · 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.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.An angle measures 145°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  5. 5.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  8. 8.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 3 o'clock (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.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  23. 23.An angle measures 15°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  24. 24.An angle measures 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  25. 25.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 20° and 125°. What is the third angle (in degrees)?
  28. 28.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  29. 29.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  31. 31.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  32. 32.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 55°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  35. 35.An angle measures 30°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  36. 36.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 80°. What is the third angle (in degrees)?

Answer key

  1. 75
  2. 100
  3. 180
  4. Obtuse
  5. 160
  6. 130
  7. Right
  8. Straight
  9. 120
  10. 150
  11. 20
  12. 60
  13. 130
  14. 90
  15. 165
  16. 80
  17. 120
  18. 65
  19. 150
  20. 25
  21. 70
  22. 90
  23. Acute
  24. Acute
  25. 10
  26. 15
  27. 35
  28. Obtuse
  29. 50
  30. 70
  31. Obtuse
  32. 45
  33. 60
  34. 110
  35. Acute
  36. 30
  37. 150
  38. 60
  39. 50
  40. 75

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