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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 661 · 40 sums
TalentJR

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 10°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  2. 2.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 80°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  5. 5.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  6. 6.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  8. 8.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 25° and 40°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  21. 21.An angle measures 100°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  22. 22.Two angles of a triangle are 20° and 25°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  24. 24.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  25. 25.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  32. 32.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  33. 33.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  34. 34.An angle measures 15°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  35. 35.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  39. 39.An angle measures 40°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  40. 40.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 70
  3. 80
  4. 90
  5. Obtuse
  6. 5
  7. Right
  8. 240
  9. 75
  10. 25
  11. 115
  12. 75
  13. 155
  14. 55
  15. 190
  16. 150
  17. 190
  18. 90
  19. 160
  20. Straight
  21. Obtuse
  22. 135
  23. 15
  24. Obtuse
  25. 130
  26. 140
  27. 170
  28. 50
  29. 95
  30. 60
  31. 105
  32. Acute
  33. 145
  34. Acute
  35. 20
  36. 60
  37. 110
  38. 100
  39. Acute
  40. 140

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