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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 915 · 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 40° and 80°. What is the third angle (in degrees)?
  2. 2.An angle measures 20°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  3. 3.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  6. 6.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  8. 8.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  13. 13.An angle measures 160°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  16. 16.An angle measures 105°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  17. 17.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  28. 28.An angle measures 155°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  29. 29.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  38. 38.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  39. 39.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  40. 40.An angle measures 15°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute

Answer key

  1. 60
  2. Acute
  3. 145
  4. 115
  5. Straight
  6. Obtuse
  7. Right
  8. 165
  9. 45
  10. 30
  11. 120
  12. 40
  13. Obtuse
  14. 70
  15. 115
  16. Obtuse
  17. 65
  18. 90
  19. 170
  20. 95
  21. 70
  22. 55
  23. 10
  24. 15
  25. 160
  26. 130
  27. 120
  28. Obtuse
  29. 45
  30. 95
  31. 90
  32. 210
  33. 60
  34. 75
  35. 150
  36. 100
  37. 70
  38. Acute
  39. 60
  40. Acute

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