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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 989 · 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 70° and 85°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 50° and 105°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 135°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 2 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.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  17. 17.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  21. 21.An angle measures 145°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  23. 23.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  26. 26.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  27. 27.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  28. 28.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  35. 35.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  36. 36.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 45° and 120°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. 25
  3. 25
  4. 180
  5. 130
  6. 95
  7. 40
  8. 100
  9. 60
  10. 5
  11. 120
  12. 180
  13. 15
  14. Right
  15. 30
  16. Acute
  17. 75
  18. 145
  19. 110
  20. 130
  21. Obtuse
  22. Acute
  23. 55
  24. 25
  25. 60
  26. Straight
  27. Acute
  28. 130
  29. 65
  30. 80
  31. 165
  32. 100
  33. 85
  34. 160
  35. Acute
  36. 30
  37. 150
  38. 210
  39. 130
  40. 15

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