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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 473 · 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 10 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 50° and 50°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  9. 9.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.An angle measures 125°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  12. 12.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  13. 13.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  14. 14.An angle measures 40°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  15. 15.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  16. 16.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  17. 17.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 20° and 105°. What is the third angle (in degrees)?
  35. 35.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  36. 36.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  37. 37.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  40. 40.An angle measures 65°. What kind of angle is it? (a) Acute (b) Straight (c) Right

Answer key

  1. 60
  2. 80
  3. 160
  4. 55
  5. 80
  6. 150
  7. 140
  8. Right
  9. 130
  10. 120
  11. Obtuse
  12. 40
  13. Obtuse
  14. Acute
  15. Straight
  16. Acute
  17. 30
  18. 10
  19. 55
  20. 15
  21. 120
  22. 150
  23. 5
  24. 60
  25. 110
  26. 25
  27. 45
  28. 40
  29. 40
  30. 50
  31. 25
  32. 105
  33. 140
  34. 55
  35. Acute
  36. Acute
  37. 70
  38. 165
  39. 85
  40. Acute

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