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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 239 · 40 sums
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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.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  3. 3.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  4. 4.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  8. 8.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  9. 9.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  13. 13.An angle measures 35°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  14. 14.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  17. 17.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  24. 24.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  25. 25.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 45° and 80°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  32. 32.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  33. 33.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?

Answer key

  1. 110
  2. 140
  3. Acute
  4. 25
  5. 90
  6. 20
  7. 55
  8. Acute
  9. 230
  10. 120
  11. 85
  12. 10
  13. Acute
  14. 120
  15. 60
  16. Right
  17. 55
  18. Straight
  19. 85
  20. 150
  21. 155
  22. 35
  23. 55
  24. Obtuse
  25. 125
  26. 150
  27. 55
  28. 60
  29. 40
  30. 55
  31. 15
  32. Acute
  33. 115
  34. 10
  35. 25
  36. 70
  37. 130
  38. 65
  39. 145
  40. 95

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