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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 383 · 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.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  2. 2.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  4. 4.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  23. 23.An angle measures 25°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  24. 24.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  28. 28.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  29. 29.An angle measures 20°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  30. 30.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  32. 32.An angle measures 145°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  33. 33.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  34. 34.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  37. 37.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  38. 38.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 70
  3. Straight
  4. 80
  5. 65
  6. 190
  7. 75
  8. 75
  9. 145
  10. 60
  11. 105
  12. 140
  13. 15
  14. 20
  15. 70
  16. 160
  17. 40
  18. 5
  19. 60
  20. 50
  21. 60
  22. 10
  23. Acute
  24. 10
  25. 130
  26. 160
  27. 30
  28. Obtuse
  29. Acute
  30. 120
  31. 125
  32. Obtuse
  33. 75
  34. Acute
  35. 70
  36. 150
  37. Right
  38. 50
  39. 85
  40. 20

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