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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 910 · 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 50° and 30°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  9. 9.An angle measures 95°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  10. 10.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  14. 14.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  15. 15.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 45° and 55°. What is the third angle (in degrees)?
  18. 18.An angle measures 15°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  19. 19.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 50° and 95°. What is the third angle (in degrees)?
  23. 23.An angle measures 165°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  24. 24.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  29. 29.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  30. 30.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  31. 31.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 45° and 100°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?

Answer key

  1. 100
  2. 50
  3. 70
  4. 60
  5. 105
  6. 110
  7. 35
  8. Right
  9. Obtuse
  10. 90
  11. 120
  12. 85
  13. 180
  14. Acute
  15. 120
  16. 90
  17. 80
  18. Acute
  19. 85
  20. 70
  21. 5
  22. 35
  23. Obtuse
  24. 90
  25. 55
  26. 50
  27. 100
  28. 115
  29. Acute
  30. Acute
  31. 70
  32. 10
  33. 35
  34. 70
  35. 75
  36. 145
  37. 35
  38. 40
  39. 80
  40. 25

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