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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 830 · 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.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  6. 6.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  12. 12.An angle measures 125°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  15. 15.An angle measures 100°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  16. 16.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  18. 18.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  19. 19.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 75° and 60°. What is the third angle (in degrees)?
  25. 25.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  26. 26.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  34. 34.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  35. 35.An angle measures 150°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  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 90° and 120°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?

Answer key

  1. 170
  2. 150
  3. 5
  4. 165
  5. Right
  6. 50
  7. 90
  8. 180
  9. 120
  10. 25
  11. 35
  12. Obtuse
  13. 60
  14. 10
  15. Obtuse
  16. 50
  17. 65
  18. Acute
  19. 90
  20. 115
  21. 170
  22. 200
  23. 140
  24. 45
  25. Obtuse
  26. 125
  27. 100
  28. 40
  29. 15
  30. 120
  31. 55
  32. 150
  33. 65
  34. Obtuse
  35. Obtuse
  36. 30
  37. 150
  38. 35
  39. 65
  40. 170

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