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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 899 · 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.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 80° and 65°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.An angle measures 130°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  10. 10.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  18. 18.An angle measures 75°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  19. 19.An angle measures 15°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  20. 20.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  25. 25.An angle measures 30°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  27. 27.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  28. 28.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  29. 29.An angle measures 70°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  30. 30.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  33. 33.An angle measures 165°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  34. 34.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  36. 36.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  37. 37.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?

Answer key

  1. 115
  2. 35
  3. 220
  4. 70
  5. 80
  6. 150
  7. 125
  8. 90
  9. Obtuse
  10. 35
  11. 30
  12. 80
  13. 20
  14. 100
  15. 100
  16. 60
  17. 30
  18. Acute
  19. Acute
  20. 105
  21. 55
  22. 80
  23. 120
  24. 20
  25. Acute
  26. 5
  27. Right
  28. 250
  29. Acute
  30. 180
  31. 180
  32. Straight
  33. Obtuse
  34. 70
  35. 35
  36. Acute
  37. 65
  38. 160
  39. 60
  40. 60

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