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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 886 · 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 125°. What is the third angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  3. 3.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  4. 4.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  5. 5.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  6. 6.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  8. 8.An angle measures 100°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  9. 9.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  11. 11.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  12. 12.An angle measures 75°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  13. 13.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.An angle measures 20°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  31. 31.An angle measures 160°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  32. 32.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. Right
  3. 45
  4. Obtuse
  5. Straight
  6. 115
  7. 55
  8. Obtuse
  9. 20
  10. 40
  11. Obtuse
  12. Acute
  13. 60
  14. 30
  15. 70
  16. 160
  17. 110
  18. 150
  19. 30
  20. 50
  21. 180
  22. 100
  23. 150
  24. 150
  25. 10
  26. 70
  27. 70
  28. 120
  29. 120
  30. Acute
  31. Obtuse
  32. 40
  33. 50
  34. 35
  35. 35
  36. 25
  37. 200
  38. 130
  39. 60
  40. 100

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