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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 432 · 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 70°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 50° and 30°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  10. 10.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  18. 18.An angle measures 35°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  19. 19.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  28. 28.An angle measures 130°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  29. 29.Two angles of a triangle are 45° and 30°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 40°. What is the third angle (in degrees)?
  35. 35.An angle measures 15°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  36. 36.An angle measures 170°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  37. 37.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?

Answer key

  1. 20
  2. 130
  3. 10
  4. 80
  5. 80
  6. 35
  7. 100
  8. 15
  9. Right
  10. 90
  11. 45
  12. 90
  13. 20
  14. 120
  15. 10
  16. 35
  17. 40
  18. Acute
  19. 65
  20. 60
  21. 50
  22. 75
  23. 45
  24. 140
  25. 150
  26. 180
  27. 140
  28. Obtuse
  29. 105
  30. 30
  31. 170
  32. 15
  33. 70
  34. 115
  35. Acute
  36. Obtuse
  37. 120
  38. 150
  39. 45
  40. 60

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