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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 978 · 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.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 30° and 135°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  6. 6.An angle measures 95°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  7. 7.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  10. 10.An angle measures 160°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  11. 11.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 75°. 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.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  18. 18.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  19. 19.An angle measures 110°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 30° and 90°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  28. 28.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  29. 29.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 20° and 155°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  38. 38.An angle measures 165°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  39. 39.An angle measures 45°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  40. 40.Two angles of a triangle are 35° and 100°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 75
  3. 15
  4. 55
  5. 90
  6. Obtuse
  7. 80
  8. 25
  9. 90
  10. Obtuse
  11. 95
  12. 5
  13. 110
  14. 95
  15. 15
  16. 180
  17. Obtuse
  18. 150
  19. Obtuse
  20. 60
  21. 20
  22. 145
  23. 45
  24. 60
  25. 60
  26. 60
  27. 110
  28. Straight
  29. 115
  30. 85
  31. 120
  32. 85
  33. 5
  34. 20
  35. 250
  36. 80
  37. 80
  38. Obtuse
  39. Acute
  40. 45

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