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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 516 · 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 45°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  4. 4.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  5. 5.An angle measures 60°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  6. 6.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  7. 7.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  17. 17.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  18. 18.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  33. 33.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  34. 34.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  38. 38.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  39. 39.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. 90
  3. 100
  4. Acute
  5. Acute
  6. Right
  7. 220
  8. 45
  9. 70
  10. 80
  11. 15
  12. 60
  13. 110
  14. 5
  15. 5
  16. 55
  17. Acute
  18. 75
  19. 180
  20. 30
  21. 10
  22. 180
  23. 105
  24. 75
  25. 135
  26. 25
  27. 150
  28. 90
  29. 165
  30. 40
  31. 50
  32. 30
  33. Straight
  34. 90
  35. 15
  36. 85
  37. 170
  38. Acute
  39. 55
  40. 10

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