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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 777 · 40 sums
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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.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  3. 3.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  4. 4.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 70° and 60°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  11. 11.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  12. 12.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  13. 13.An angle measures 45°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  14. 14.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  16. 16.An angle measures 20°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  17. 17.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  20. 20.An angle measures 110°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  21. 21.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  28. 28.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  29. 29.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  30. 30.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  38. 38.An angle measures 70°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  39. 39.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?

Answer key

  1. 75
  2. Acute
  3. Straight
  4. 105
  5. 40
  6. 70
  7. 20
  8. 60
  9. 50
  10. 55
  11. Acute
  12. 65
  13. Acute
  14. 80
  15. 90
  16. Acute
  17. 70
  18. 165
  19. 35
  20. Obtuse
  21. 140
  22. 10
  23. 50
  24. 90
  25. 130
  26. 110
  27. 60
  28. Right
  29. Obtuse
  30. 120
  31. 30
  32. 80
  33. 125
  34. 85
  35. 15
  36. 85
  37. 90
  38. Acute
  39. 150
  40. 100

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