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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 851 · 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.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  10. 10.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  11. 11.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  12. 12.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  13. 13.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  14. 14.An angle measures 55°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  15. 15.An angle measures 145°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  16. 16.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  21. 21.An angle measures 130°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  22. 22.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  23. 23.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  24. 24.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  28. 28.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  29. 29.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  31. 31.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.Two angles of a triangle are 45° and 55°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 45° and 120°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 120
  3. 60
  4. 120
  5. 55
  6. 65
  7. 130
  8. 60
  9. 75
  10. Obtuse
  11. 150
  12. Acute
  13. Right
  14. Acute
  15. Obtuse
  16. 70
  17. 45
  18. 55
  19. 75
  20. 35
  21. Obtuse
  22. 90
  23. Acute
  24. 160
  25. 145
  26. 180
  27. 240
  28. Acute
  29. 60
  30. 125
  31. Obtuse
  32. 80
  33. 20
  34. 130
  35. 50
  36. 20
  37. 90
  38. 15
  39. 100
  40. 40

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