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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 565 · 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) Acute (b) Right (c) Straight
  2. 2.An angle measures 55°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  3. 3.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  8. 8.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  12. 12.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  13. 13.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  20. 20.An angle measures 65°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  21. 21.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  22. 22.An angle measures 110°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  23. 23.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  27. 27.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  28. 28.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  29. 29.An angle measures 170°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  30. 30.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  31. 31.An angle measures 80°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  32. 32.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 45°. What is the other 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.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  39. 39.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  40. 40.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?

Answer key

  1. Straight
  2. Acute
  3. 25
  4. 20
  5. 110
  6. 60
  7. Acute
  8. 30
  9. 10
  10. 55
  11. 15
  12. Acute
  13. 15
  14. 130
  15. 170
  16. 75
  17. 40
  18. 10
  19. 60
  20. Acute
  21. 50
  22. Obtuse
  23. 145
  24. 105
  25. 120
  26. 100
  27. Right
  28. 70
  29. Obtuse
  30. 35
  31. Acute
  32. 150
  33. 60
  34. 135
  35. 75
  36. 15
  37. 85
  38. 140
  39. Obtuse
  40. 30

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