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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 529 · 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 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  2. 2.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  3. 3.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  17. 17.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  18. 18.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  25. 25.An angle measures 120°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  29. 29.An angle measures 70°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  30. 30.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  35. 35.Two angles of a triangle are 45° and 95°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  38. 38.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  39. 39.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?

Answer key

  1. Right
  2. Obtuse
  3. 10
  4. 60
  5. 10
  6. 30
  7. 190
  8. 60
  9. 140
  10. 70
  11. 15
  12. 80
  13. 15
  14. 10
  15. 60
  16. 135
  17. Obtuse
  18. 5
  19. 90
  20. 60
  21. 130
  22. 210
  23. 15
  24. 100
  25. Obtuse
  26. 155
  27. 80
  28. 55
  29. Acute
  30. 55
  31. 35
  32. 220
  33. 100
  34. Straight
  35. 40
  36. 160
  37. 110
  38. Obtuse
  39. 40
  40. 30

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