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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 363 · 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 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  2. 2.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  3. 3.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 35° and 95°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  28. 28.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  29. 29.A right angle is split into two angles. One of them is 15°. 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.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 35° and 90°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  37. 37.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  38. 38.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 45° and 80°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. Straight
  3. 120
  4. 70
  5. 45
  6. 130
  7. 180
  8. 30
  9. 10
  10. 90
  11. 50
  12. 70
  13. 30
  14. 40
  15. 260
  16. 130
  17. 60
  18. 150
  19. 20
  20. 190
  21. 120
  22. 30
  23. 180
  24. 75
  25. 40
  26. 85
  27. 60
  28. Acute
  29. 75
  30. 135
  31. 130
  32. 85
  33. 10
  34. 120
  35. 55
  36. 170
  37. Acute
  38. 145
  39. 55
  40. 75

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