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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 132 · 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.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  3. 3.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  4. 4.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  6. 6.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  7. 7.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  8. 8.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  12. 12.An angle measures 85°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  13. 13.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  19. 19.An angle measures 65°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  20. 20.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  32. 32.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  33. 33.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 140°. What is the third angle (in degrees)?
  40. 40.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute

Answer key

  1. 180
  2. 20
  3. Obtuse
  4. 60
  5. Right
  6. Straight
  7. Acute
  8. 90
  9. 150
  10. 105
  11. 50
  12. Acute
  13. 50
  14. 35
  15. 210
  16. 165
  17. 55
  18. 90
  19. Acute
  20. 75
  21. 40
  22. 160
  23. 100
  24. 160
  25. 65
  26. 25
  27. 110
  28. 250
  29. 25
  30. 120
  31. 170
  32. Obtuse
  33. 5
  34. 30
  35. 55
  36. 110
  37. 80
  38. 50
  39. 15
  40. Acute

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