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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 506 · 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.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  2. 2.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  3. 3.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  9. 9.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  11. 11.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  12. 12.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  15. 15.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  16. 16.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  17. 17.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  18. 18.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  21. 21.An angle measures 55°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  23. 23.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  34. 34.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  35. 35.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  36. 36.An angle measures 85°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  37. 37.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  38. 38.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  39. 39.An angle measures 130°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  40. 40.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute

Answer key

  1. 180
  2. Obtuse
  3. 220
  4. 20
  5. 25
  6. 45
  7. 20
  8. Straight
  9. 90
  10. 80
  11. Obtuse
  12. 30
  13. 75
  14. 50
  15. Acute
  16. 100
  17. Acute
  18. 30
  19. 90
  20. 45
  21. Acute
  22. Obtuse
  23. 120
  24. 65
  25. 30
  26. 150
  27. 45
  28. 60
  29. 60
  30. 50
  31. 170
  32. 180
  33. 165
  34. Right
  35. 150
  36. Acute
  37. Acute
  38. Acute
  39. Obtuse
  40. Obtuse

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