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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 983 · 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.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  8. 8.Two angles of a triangle are 80° and 25°. What is the third angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  10. 10.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  14. 14.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  15. 15.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  26. 26.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  27. 27.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  28. 28.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 60° and 85°. What is the third angle (in degrees)?
  37. 37.An angle measures 145°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  38. 38.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?

Answer key

  1. 130
  2. 55
  3. 25
  4. 170
  5. 10
  6. 30
  7. Straight
  8. 75
  9. Right
  10. 80
  11. 50
  12. 15
  13. 10
  14. Acute
  15. 25
  16. 60
  17. 35
  18. Obtuse
  19. 30
  20. 90
  21. 165
  22. 150
  23. 150
  24. 100
  25. 15
  26. Obtuse
  27. Acute
  28. 150
  29. 75
  30. 70
  31. 120
  32. 60
  33. 60
  34. 20
  35. 40
  36. 35
  37. Obtuse
  38. 25
  39. 180
  40. 105

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