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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 598 · 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 10°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  11. 11.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  13. 13.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  14. 14.An angle measures 115°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  15. 15.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.An angle measures 40°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  19. 19.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  21. 21.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  22. 22.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  23. 23.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  24. 24.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  30. 30.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  31. 31.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 45° and 120°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 80
  2. 115
  3. 180
  4. 150
  5. 10
  6. 30
  7. 25
  8. 120
  9. 200
  10. 120
  11. Acute
  12. Acute
  13. 140
  14. Obtuse
  15. 115
  16. 45
  17. 30
  18. Acute
  19. 65
  20. 160
  21. Straight
  22. 65
  23. Obtuse
  24. 90
  25. 150
  26. 180
  27. 155
  28. 170
  29. 60
  30. Right
  31. 120
  32. 110
  33. 15
  34. 130
  35. 60
  36. 50
  37. 40
  38. 135
  39. 35
  40. 35

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