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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 204 · 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 15°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.An angle measures 110°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  4. 4.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  6. 6.An angle measures 145°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  7. 7.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  8. 8.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  10. 10.An angle measures 115°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  11. 11.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  13. 13.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  16. 16.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  24. 24.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  25. 25.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 60° and 65°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?

Answer key

  1. 165
  2. 75
  3. Obtuse
  4. 55
  5. 95
  6. Obtuse
  7. Obtuse
  8. 90
  9. Straight
  10. Obtuse
  11. 30
  12. 100
  13. Obtuse
  14. 30
  15. Right
  16. 150
  17. 150
  18. 45
  19. 120
  20. 60
  21. 25
  22. 60
  23. 140
  24. Acute
  25. 25
  26. 65
  27. 45
  28. 40
  29. 75
  30. 65
  31. 70
  32. 90
  33. 145
  34. 55
  35. 160
  36. 240
  37. 60
  38. 160
  39. 10
  40. 180

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