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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 379 · 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 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  2. 2.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 85° and 80°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  12. 12.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  15. 15.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  16. 16.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  19. 19.An angle measures 130°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  20. 20.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 40° and 30°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  31. 31.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  32. 32.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 210
  3. 15
  4. 50
  5. 65
  6. Right
  7. 35
  8. 10
  9. 15
  10. 25
  11. 170
  12. Obtuse
  13. 150
  14. 180
  15. Acute
  16. 155
  17. 130
  18. 55
  19. Obtuse
  20. 20
  21. 100
  22. 90
  23. 60
  24. 110
  25. 120
  26. 130
  27. 20
  28. 140
  29. 30
  30. 135
  31. Acute
  32. 70
  33. 120
  34. 170
  35. 140
  36. 25
  37. 75
  38. 90
  39. 110
  40. 200

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