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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 900 · 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.An angle measures 130°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  3. 3.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  9. 9.An angle measures 45°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  10. 10.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  18. 18.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  19. 19.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 45° and 90°. What is the third angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  24. 24.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?
  33. 33.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  34. 34.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 55° and 100°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  38. 38.An angle measures 160°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  39. 39.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?

Answer key

  1. 90
  2. Obtuse
  3. 145
  4. 150
  5. 120
  6. 80
  7. 165
  8. Straight
  9. Acute
  10. 35
  11. 110
  12. 90
  13. 60
  14. 60
  15. 120
  16. 60
  17. 170
  18. Acute
  19. 65
  20. 5
  21. 210
  22. 45
  23. Right
  24. 40
  25. 90
  26. 70
  27. 90
  28. 160
  29. 50
  30. 20
  31. 210
  32. 95
  33. Acute
  34. 140
  35. 45
  36. 25
  37. 35
  38. Obtuse
  39. 65
  40. 70

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