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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 274 · 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 30°. What is the other 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.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  13. 13.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  17. 17.An angle measures 20°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  18. 18.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  25. 25.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  28. 28.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  29. 29.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 75° and 100°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  34. 34.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  35. 35.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  36. 36.An angle measures 70°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  37. 37.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. 50
  3. 100
  4. 5
  5. 60
  6. 50
  7. 40
  8. 85
  9. 165
  10. 60
  11. 120
  12. Right
  13. 120
  14. 55
  15. 10
  16. 90
  17. Acute
  18. 80
  19. 70
  20. 30
  21. 45
  22. 45
  23. 85
  24. Obtuse
  25. 115
  26. 25
  27. 10
  28. Acute
  29. 45
  30. 95
  31. 240
  32. 5
  33. 35
  34. Acute
  35. 150
  36. Acute
  37. 70
  38. 105
  39. 65
  40. 80

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