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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 852 · 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.An angle measures 20°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  4. 4.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.An angle measures 160°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  12. 12.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  17. 17.An angle measures 105°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  18. 18.Two angles of a triangle are 35° and 70°. What is the third 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.Two angles of a triangle are 20° and 130°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  24. 24.An angle measures 175°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  25. 25.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  32. 32.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  33. 33.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  38. 38.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  39. 39.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 80°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 65
  3. Obtuse
  4. 30
  5. 180
  6. 35
  7. 75
  8. 80
  9. Right
  10. 120
  11. Obtuse
  12. 75
  13. 60
  14. 85
  15. 60
  16. 80
  17. Obtuse
  18. 75
  19. 35
  20. 30
  21. 130
  22. 55
  23. 40
  24. Obtuse
  25. 40
  26. 55
  27. 150
  28. 30
  29. 65
  30. 90
  31. 150
  32. Obtuse
  33. 15
  34. 60
  35. 150
  36. 50
  37. 130
  38. Straight
  39. 210
  40. 50

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