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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 187 · 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 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  2. 2.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  16. 16.An angle measures 65°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  17. 17.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  19. 19.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  20. 20.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  21. 21.Two angles of a triangle are 35° and 80°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  23. 23.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  24. 24.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  28. 28.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  29. 29.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.An angle measures 115°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  40. 40.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight

Answer key

  1. Straight
  2. 110
  3. 165
  4. 45
  5. 60
  6. 35
  7. 95
  8. 75
  9. 40
  10. 120
  11. 90
  12. 180
  13. 15
  14. 30
  15. 70
  16. Acute
  17. 70
  18. Right
  19. 85
  20. Obtuse
  21. 65
  22. 120
  23. Acute
  24. 20
  25. 50
  26. 5
  27. 140
  28. Acute
  29. 220
  30. 60
  31. 30
  32. 75
  33. Obtuse
  34. 65
  35. 140
  36. 110
  37. 25
  38. 45
  39. 30
  40. Obtuse

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