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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 979 · 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 20° and 115°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  5. 5.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  6. 6.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  7. 7.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 85° and 85°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  12. 12.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  13. 13.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  25. 25.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  26. 26.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  27. 27.An angle measures 140°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  28. 28.An angle measures 160°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  29. 29.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  34. 34.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  35. 35.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?

Answer key

  1. 45
  2. 30
  3. 110
  4. Right
  5. 60
  6. Acute
  7. 40
  8. 10
  9. 100
  10. 30
  11. Obtuse
  12. Acute
  13. 45
  14. 140
  15. 80
  16. 210
  17. 130
  18. 60
  19. 120
  20. 220
  21. 170
  22. 90
  23. 80
  24. 15
  25. Obtuse
  26. Straight
  27. Obtuse
  28. Obtuse
  29. 135
  30. 170
  31. 80
  32. 85
  33. 45
  34. Obtuse
  35. 125
  36. 120
  37. 30
  38. 25
  39. 180
  40. 95

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