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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 347 · 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 65°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  4. 4.An angle measures 70°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  5. 5.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  9. 9.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  20. 20.An angle measures 100°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  21. 21.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  23. 23.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  24. 24.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  25. 25.An angle measures 150°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  26. 26.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  33. 33.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  34. 34.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 50° and 95°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 45° and 65°. What is the third angle (in degrees)?

Answer key

  1. 25
  2. 70
  3. 120
  4. Acute
  5. 70
  6. 60
  7. 60
  8. Straight
  9. 15
  10. 95
  11. 70
  12. 90
  13. 10
  14. 100
  15. 55
  16. 90
  17. 45
  18. 30
  19. 5
  20. Obtuse
  21. Right
  22. 260
  23. Acute
  24. 180
  25. Obtuse
  26. 70
  27. 150
  28. 5
  29. 65
  30. 220
  31. 120
  32. 30
  33. Acute
  34. 110
  35. 85
  36. 35
  37. 120
  38. 120
  39. 15
  40. 70

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