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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 202 · 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 145°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  7. 7.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  8. 8.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 30° and 125°. What is the third angle (in degrees)?
  12. 12.An angle measures 115°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  13. 13.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  14. 14.An angle measures 120°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  15. 15.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  18. 18.An angle measures 135°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  19. 19.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  22. 22.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  23. 23.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  24. 24.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  32. 32.An angle measures 75°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  36. 36.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  37. 37.Two angles of a triangle are 60° and 85°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 140
  3. 20
  4. 35
  5. 70
  6. 120
  7. Acute
  8. 70
  9. 150
  10. 160
  11. 25
  12. Obtuse
  13. 55
  14. Obtuse
  15. 140
  16. 95
  17. 230
  18. Obtuse
  19. 90
  20. 50
  21. 130
  22. Acute
  23. Right
  24. 50
  25. 220
  26. 100
  27. 90
  28. 80
  29. 100
  30. 120
  31. 75
  32. Acute
  33. 150
  34. 50
  35. 60
  36. Obtuse
  37. 35
  38. 165
  39. 30
  40. 45

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