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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 863 · 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 170°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  2. 2.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  13. 13.An angle measures 20°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 20° and 135°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  24. 24.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  25. 25.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  27. 27.An angle measures 30°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  28. 28.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  33. 33.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  34. 34.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  38. 38.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  39. 39.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?

Answer key

  1. Obtuse
  2. Obtuse
  3. 170
  4. 110
  5. 150
  6. 55
  7. 170
  8. 70
  9. 145
  10. 120
  11. 135
  12. 90
  13. Acute
  14. 90
  15. 25
  16. 55
  17. 100
  18. 40
  19. 60
  20. 70
  21. 75
  22. 45
  23. 150
  24. Right
  25. 10
  26. 100
  27. Acute
  28. 20
  29. 35
  30. 130
  31. 5
  32. 35
  33. Straight
  34. 60
  35. 165
  36. 180
  37. 55
  38. Acute
  39. 220
  40. 120

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