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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 126 · 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) Straight (b) Acute (c) Right
  2. 2.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  3. 3.An angle measures 60°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  4. 4.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 25° and 130°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  10. 10.Two angles of a triangle are 20° and 120°. 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 110°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  13. 13.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  23. 23.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  24. 24.Two angles of a triangle are 25° and 75°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  31. 31.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  32. 32.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 25° and 120°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 5
  3. Acute
  4. 45
  5. 210
  6. 85
  7. 25
  8. 20
  9. Right
  10. 40
  11. 170
  12. Obtuse
  13. 20
  14. 35
  15. 60
  16. 60
  17. 55
  18. 70
  19. 120
  20. 130
  21. 30
  22. 95
  23. Acute
  24. 80
  25. 60
  26. 145
  27. 15
  28. 30
  29. 100
  30. 90
  31. Acute
  32. 10
  33. 120
  34. 25
  35. 50
  36. 200
  37. 35
  38. 25
  39. 170
  40. 100

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