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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 115 · 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 90° and 75°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  4. 4.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  5. 5.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  8. 8.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  9. 9.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  12. 12.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  13. 13.A right angle is split into two angles. One of them is 30°. What is the other angle (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.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  30. 30.An angle measures 150°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  31. 31.Two angles of a triangle are 50° and 80°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  34. 34.An angle measures 95°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?

Answer key

  1. 15
  2. 70
  3. Right
  4. Obtuse
  5. 65
  6. 45
  7. 220
  8. Acute
  9. 120
  10. 65
  11. 100
  12. Acute
  13. 60
  14. 90
  15. 40
  16. 120
  17. 25
  18. 60
  19. 60
  20. 85
  21. 60
  22. 10
  23. 45
  24. 105
  25. 160
  26. 200
  27. 240
  28. 145
  29. 95
  30. Obtuse
  31. 50
  32. 220
  33. 60
  34. Obtuse
  35. 90
  36. 5
  37. 150
  38. 240
  39. 40
  40. 25

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