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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 812 · 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.Two angles of a triangle are 60° and 95°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  5. 5.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  6. 6.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  9. 9.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  10. 10.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 100°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  16. 16.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  17. 17.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  21. 21.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  31. 31.An angle measures 130°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  32. 32.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  37. 37.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  38. 38.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  39. 39.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  40. 40.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?

Answer key

  1. 25
  2. 35
  3. 30
  4. Straight
  5. Acute
  6. 70
  7. 65
  8. 80
  9. Obtuse
  10. 85
  11. 70
  12. 100
  13. 105
  14. 45
  15. 15
  16. Acute
  17. 25
  18. 120
  19. 100
  20. 60
  21. Acute
  22. 100
  23. 125
  24. 45
  25. 55
  26. 120
  27. 120
  28. 150
  29. 60
  30. 100
  31. Obtuse
  32. 90
  33. 80
  34. 90
  35. 50
  36. 150
  37. Acute
  38. 50
  39. Right
  40. 30

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