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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 17 · 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 together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  2. 2.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  3. 3.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  7. 7.An angle measures 100°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  8. 8.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  11. 11.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 85° and 80°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 7 o'clock (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 70° and 170°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  26. 26.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  27. 27.An angle measures 55°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  28. 28.Two angles together make a straight line. One of them is 80°. 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.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 20° and 25°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 55° and 100°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  38. 38.An angle measures 80°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  39. 39.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?

Answer key

  1. 55
  2. Acute
  3. 170
  4. 125
  5. 35
  6. Right
  7. Obtuse
  8. 90
  9. 130
  10. Straight
  11. 50
  12. 80
  13. 15
  14. 140
  15. 170
  16. 15
  17. 60
  18. 20
  19. 10
  20. 180
  21. 150
  22. 150
  23. 120
  24. 10
  25. 30
  26. Acute
  27. Acute
  28. 100
  29. 65
  30. 80
  31. 135
  32. 25
  33. 95
  34. 60
  35. 75
  36. 35
  37. 130
  38. Acute
  39. 145
  40. 50

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