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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 570 · 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.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  6. 6.An angle measures 10°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  7. 7.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  13. 13.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  17. 17.An angle measures 125°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  18. 18.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  20. 20.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  24. 24.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 60° and 50°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  34. 34.An angle measures 20°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  35. 35.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?

Answer key

  1. 180
  2. 30
  3. 150
  4. 70
  5. 120
  6. Acute
  7. 35
  8. 120
  9. 75
  10. 180
  11. 60
  12. Right
  13. 65
  14. 210
  15. 90
  16. Obtuse
  17. Obtuse
  18. 100
  19. 150
  20. Obtuse
  21. 30
  22. 190
  23. Straight
  24. 170
  25. 85
  26. 45
  27. 5
  28. 60
  29. 70
  30. 120
  31. 90
  32. 35
  33. 60
  34. Acute
  35. 220
  36. 120
  37. 90
  38. 15
  39. 80
  40. 150

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