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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 637 · 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.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 40° and 95°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  15. 15.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  16. 16.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 65° and 75°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  26. 26.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  27. 27.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  32. 32.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  33. 33.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  34. 34.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  35. 35.An angle measures 140°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?

Answer key

  1. 5
  2. 130
  3. 50
  4. 150
  5. 10
  6. 180
  7. 45
  8. 100
  9. 45
  10. 70
  11. 120
  12. 50
  13. 120
  14. 50
  15. Acute
  16. 5
  17. 130
  18. 65
  19. 55
  20. 125
  21. 150
  22. 20
  23. 60
  24. 40
  25. 130
  26. Acute
  27. 190
  28. 135
  29. 10
  30. 30
  31. Straight
  32. 5
  33. Right
  34. 90
  35. Obtuse
  36. 210
  37. 30
  38. 60
  39. 160
  40. 100

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