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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 495 · 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 together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  3. 3.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  4. 4.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  8. 8.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  9. 9.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  10. 10.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  16. 16.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  27. 27.An angle measures 105°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  28. 28.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  29. 29.An angle measures 135°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  30. 30.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  33. 33.An angle measures 55°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  34. 34.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?

Answer key

  1. 60
  2. Straight
  3. Acute
  4. 150
  5. 130
  6. 90
  7. 110
  8. Acute
  9. Right
  10. 110
  11. 125
  12. 35
  13. 90
  14. 165
  15. 160
  16. Acute
  17. 30
  18. 115
  19. 85
  20. 60
  21. 20
  22. 75
  23. 50
  24. 15
  25. 65
  26. 80
  27. Obtuse
  28. 10
  29. Obtuse
  30. 85
  31. 95
  32. 120
  33. Acute
  34. 210
  35. 10
  36. 60
  37. 60
  38. 150
  39. 55
  40. 60

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