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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 366 · 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 70° and 75°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  5. 5.An angle measures 155°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  6. 6.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  24. 24.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  25. 25.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  31. 31.An angle measures 80°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  32. 32.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  35. 35.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.An angle measures 120°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  37. 37.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?

Answer key

  1. 35
  2. 30
  3. 50
  4. 60
  5. Obtuse
  6. 50
  7. Straight
  8. 30
  9. 15
  10. 170
  11. 30
  12. 35
  13. 160
  14. 150
  15. 95
  16. Right
  17. 90
  18. 25
  19. 40
  20. 60
  21. 100
  22. 55
  23. 150
  24. Acute
  25. 70
  26. 180
  27. 120
  28. 70
  29. 190
  30. 90
  31. Acute
  32. 20
  33. 35
  34. 25
  35. Acute
  36. Obtuse
  37. 55
  38. 5
  39. 60
  40. 150

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