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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 546 · 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) Straight (c) Right
  2. 2.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  10. 10.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  13. 13.An angle measures 135°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  14. 14.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  15. 15.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  16. 16.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  20. 20.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  21. 21.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  32. 32.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  33. 33.An angle measures 60°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  34. 34.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?

Answer key

  1. Right
  2. 130
  3. 150
  4. 140
  5. 55
  6. 90
  7. 55
  8. 100
  9. 45
  10. Acute
  11. 15
  12. 120
  13. Obtuse
  14. 65
  15. Obtuse
  16. 110
  17. 155
  18. 130
  19. 110
  20. Obtuse
  21. 20
  22. 140
  23. 5
  24. 80
  25. 40
  26. 150
  27. 25
  28. 95
  29. 65
  30. 45
  31. 110
  32. Straight
  33. Acute
  34. 190
  35. 140
  36. 165
  37. 140
  38. 90
  39. 85
  40. 115

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