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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 700 · 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 90° and 60°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  5. 5.Two angles of a triangle are 20° and 95°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 45° and 20°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  17. 17.Two angles of a triangle are 65° and 70°. 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.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  20. 20.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  21. 21.An angle measures 30°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  22. 22.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 20° and 70°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 20° and 135°. What is the third angle (in degrees)?
  27. 27.An angle measures 15°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  28. 28.Two angles of a triangle are 45° and 80°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  38. 38.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  39. 39.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?

Answer key

  1. 210
  2. 70
  3. 140
  4. Straight
  5. 65
  6. 210
  7. 5
  8. 10
  9. 40
  10. 80
  11. 115
  12. 15
  13. 180
  14. 135
  15. 35
  16. Right
  17. 45
  18. 60
  19. 30
  20. Obtuse
  21. Acute
  22. 80
  23. 75
  24. 150
  25. 90
  26. 25
  27. Acute
  28. 55
  29. 150
  30. 15
  31. 20
  32. 60
  33. 140
  34. 30
  35. 170
  36. 120
  37. 35
  38. Obtuse
  39. 90
  40. 75

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