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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 938 · 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.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  4. 4.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  5. 5.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 25° and 40°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 50° and 90°. What is the third angle (in degrees)?
  11. 11.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  20. 20.An angle measures 145°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  21. 21.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  22. 22.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  23. 23.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.An angle measures 155°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  27. 27.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  29. 29.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  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 65° and 100°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  36. 36.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  37. 37.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  40. 40.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Straight

Answer key

  1. 30
  2. 65
  3. 190
  4. Obtuse
  5. 150
  6. 120
  7. 200
  8. 115
  9. 90
  10. 40
  11. Acute
  12. 50
  13. 10
  14. 40
  15. 20
  16. 70
  17. 60
  18. 25
  19. 90
  20. Obtuse
  21. 15
  22. Acute
  23. 150
  24. 55
  25. 10
  26. Obtuse
  27. 90
  28. 20
  29. Right
  30. 130
  31. 15
  32. 85
  33. 50
  34. 65
  35. 120
  36. Acute
  37. 220
  38. 80
  39. 70
  40. Acute

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