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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 201 · 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 100° and 140°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  16. 16.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  21. 21.An angle measures 70°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  22. 22.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  23. 23.An angle measures 60°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  24. 24.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  30. 30.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  35. 35.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?

Answer key

  1. 120
  2. 70
  3. 35
  4. 180
  5. 55
  6. 60
  7. 80
  8. 40
  9. 60
  10. 150
  11. 10
  12. 110
  13. 140
  14. 25
  15. Straight
  16. 90
  17. 75
  18. 170
  19. 220
  20. 85
  21. Acute
  22. 105
  23. Acute
  24. 15
  25. 165
  26. 50
  27. 40
  28. 35
  29. 250
  30. Right
  31. 150
  32. 100
  33. 15
  34. 60
  35. Acute
  36. 55
  37. 30
  38. 220
  39. 60
  40. 180

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