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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 648 · 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 45° and 50°. What is the third angle (in degrees)?
  2. 2.An angle measures 55°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  3. 3.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  10. 10.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  11. 11.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  12. 12.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 45° and 110°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  20. 20.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  23. 23.An angle measures 110°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  24. 24.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  25. 25.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  35. 35.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?

Answer key

  1. 85
  2. Acute
  3. 70
  4. 160
  5. 60
  6. 130
  7. 130
  8. 150
  9. 55
  10. Acute
  11. Obtuse
  12. 150
  13. 210
  14. 25
  15. 145
  16. 45
  17. 10
  18. 30
  19. Right
  20. 120
  21. 230
  22. 65
  23. Obtuse
  24. 80
  25. Acute
  26. 25
  27. 100
  28. 60
  29. 165
  30. 80
  31. 60
  32. 35
  33. 180
  34. Straight
  35. 80
  36. 30
  37. 65
  38. 85
  39. 120
  40. 60

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