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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 456 · 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 10 o'clock (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  12. 12.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  13. 13.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  14. 14.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  16. 16.An angle measures 175°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  17. 17.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  18. 18.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  23. 23.An angle measures 10°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  24. 24.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  28. 28.An angle measures 155°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  29. 29.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  34. 34.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  37. 37.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  38. 38.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?

Answer key

  1. 60
  2. 60
  3. 30
  4. 45
  5. 45
  6. 70
  7. 80
  8. 75
  9. 115
  10. 40
  11. 15
  12. Obtuse
  13. Straight
  14. 60
  15. 170
  16. Obtuse
  17. Acute
  18. 85
  19. 160
  20. 150
  21. 100
  22. 50
  23. Acute
  24. Acute
  25. 120
  26. 170
  27. 140
  28. Obtuse
  29. 50
  30. 10
  31. 30
  32. 55
  33. 95
  34. Acute
  35. 55
  36. 50
  37. Obtuse
  38. 5
  39. 10
  40. 135

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