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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 170 · 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 75° and 70°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  6. 6.An angle measures 175°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  7. 7.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 65° and 20°. What is the third angle (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 50°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  18. 18.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  19. 19.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  20. 20.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  21. 21.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  22. 22.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 45° and 100°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  27. 27.An angle measures 25°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  28. 28.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  33. 33.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  34. 34.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  35. 35.An angle measures 95°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  36. 36.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  37. 37.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?

Answer key

  1. 35
  2. 230
  3. 95
  4. 125
  5. 35
  6. Obtuse
  7. 150
  8. 30
  9. 160
  10. 30
  11. 140
  12. 140
  13. 110
  14. 50
  15. 95
  16. 40
  17. Acute
  18. 10
  19. Acute
  20. 40
  21. Acute
  22. 20
  23. 170
  24. 120
  25. 35
  26. 130
  27. Acute
  28. 25
  29. 45
  30. 155
  31. 200
  32. 150
  33. Obtuse
  34. 70
  35. Obtuse
  36. 150
  37. Straight
  38. 5
  39. 75
  40. 85

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