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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 821 · 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 55° and 80°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  11. 11.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  12. 12.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  16. 16.An angle measures 80°. 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 130°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  28. 28.An angle measures 160°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  29. 29.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  32. 32.An angle measures 125°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  33. 33.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?

Answer key

  1. 45
  2. 60
  3. 130
  4. 20
  5. 85
  6. 40
  7. 5
  8. 80
  9. 70
  10. Straight
  11. Right
  12. 75
  13. 30
  14. 90
  15. 75
  16. Acute
  17. 50
  18. 120
  19. 110
  20. 130
  21. 30
  22. 120
  23. 125
  24. 210
  25. 60
  26. 180
  27. Acute
  28. Obtuse
  29. 35
  30. 80
  31. 40
  32. Obtuse
  33. 20
  34. 80
  35. 150
  36. 90
  37. 130
  38. 150
  39. 160
  40. 190

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