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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 798 · 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.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?
  12. 12.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 100° and 100°. What is the third 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.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  24. 24.An angle measures 85°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  25. 25.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  28. 28.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  29. 29.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  30. 30.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  31. 31.An angle measures 135°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  35. 35.An angle measures 95°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  36. 36.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. 50
  3. 90
  4. 120
  5. 30
  6. 220
  7. 60
  8. 70
  9. 90
  10. 45
  11. 15
  12. Straight
  13. 150
  14. 15
  15. 170
  16. 180
  17. 70
  18. 35
  19. 160
  20. 125
  21. 35
  22. 150
  23. 70
  24. Acute
  25. Right
  26. 100
  27. 20
  28. Obtuse
  29. 15
  30. Obtuse
  31. Obtuse
  32. 55
  33. 80
  34. 35
  35. Obtuse
  36. 85
  37. 135
  38. 145
  39. 85
  40. 90

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