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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 326 · 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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  6. 6.Two angles together make a straight line. One of them is 15°. 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.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  12. 12.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 25° and 70°. 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.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 45° and 80°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  28. 28.An angle measures 15°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  29. 29.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  31. 31.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  32. 32.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  36. 36.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  37. 37.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  38. 38.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  39. 39.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?

Answer key

  1. 90
  2. 50
  3. 190
  4. 150
  5. Right
  6. 165
  7. 40
  8. 10
  9. 50
  10. 170
  11. Straight
  12. 20
  13. 85
  14. 40
  15. 150
  16. 160
  17. 35
  18. 155
  19. 55
  20. 145
  21. 50
  22. 130
  23. 180
  24. 95
  25. 90
  26. 65
  27. 100
  28. Acute
  29. 135
  30. 90
  31. Acute
  32. 35
  33. 120
  34. 30
  35. 45
  36. Acute
  37. 80
  38. Obtuse
  39. 120
  40. 95

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