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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 421 · 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 90° and 85°. What is the third angle (in degrees)?
  2. 2.An angle measures 55°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  3. 3.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  5. 5.An angle measures 15°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  6. 6.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  14. 14.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  15. 15.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  17. 17.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  18. 18.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  29. 29.An angle measures 35°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  30. 30.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 70° and 80°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  33. 33.An angle measures 135°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  34. 34.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  38. 38.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  39. 39.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  40. 40.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right

Answer key

  1. 5
  2. Acute
  3. 25
  4. 45
  5. Acute
  6. 15
  7. 90
  8. 80
  9. 35
  10. 85
  11. 60
  12. Right
  13. 150
  14. Straight
  15. 120
  16. 40
  17. Obtuse
  18. 85
  19. 80
  20. 75
  21. 55
  22. 75
  23. 180
  24. 45
  25. 40
  26. 45
  27. 65
  28. 100
  29. Acute
  30. 140
  31. 30
  32. 30
  33. Obtuse
  34. 150
  35. 160
  36. 125
  37. 65
  38. Obtuse
  39. 140
  40. Obtuse

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