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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 200 · 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 of a triangle are 80° and 80°. What is the third angle (in degrees)?
  2. 2.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  3. 3.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  6. 6.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  8. 8.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  16. 16.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?
  20. 20.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  21. 21.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  26. 26.An angle measures 65°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  27. 27.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  30. 30.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  31. 31.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  35. 35.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  36. 36.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?

Answer key

  1. 20
  2. Acute
  3. 60
  4. 150
  5. 110
  6. Acute
  7. Right
  8. 200
  9. 120
  10. 65
  11. 10
  12. 70
  13. 20
  14. 130
  15. Straight
  16. 40
  17. 40
  18. 65
  19. 45
  20. Obtuse
  21. 30
  22. 60
  23. 40
  24. 10
  25. 120
  26. Acute
  27. 90
  28. 160
  29. 105
  30. Obtuse
  31. 120
  32. 90
  33. 65
  34. 65
  35. Acute
  36. 75
  37. 60
  38. 260
  39. 60
  40. 65

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