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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 341 · 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 95° and 55°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  3. 3.An angle measures 115°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  4. 4.An angle measures 85°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  5. 5.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  6. 6.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  11. 11.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  12. 12.An angle measures 15°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  13. 13.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  14. 14.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  15. 15.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  16. 16.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 8 o'clock (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.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 120°. 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.An angle measures 40°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  28. 28.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  31. 31.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  32. 32.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 5 o'clock (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.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 85
  3. Obtuse
  4. Acute
  5. 135
  6. Acute
  7. 170
  8. 50
  9. 110
  10. 130
  11. Obtuse
  12. Acute
  13. Straight
  14. 80
  15. Obtuse
  16. 150
  17. 60
  18. 15
  19. 80
  20. 230
  21. 120
  22. 95
  23. 120
  24. 90
  25. 60
  26. 50
  27. Acute
  28. 25
  29. 80
  30. 55
  31. Right
  32. 45
  33. 65
  34. 150
  35. 150
  36. 145
  37. 75
  38. 25
  39. 210
  40. 50

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