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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 220 · 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) Right (b) Obtuse (c) Straight
  2. 2.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  6. 6.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  7. 7.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  10. 10.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  11. 11.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 65° and 20°. What is the third angle (in degrees)?
  17. 17.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  18. 18.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  24. 24.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  25. 25.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  26. 26.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  35. 35.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  36. 36.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  39. 39.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  40. 40.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 30
  3. 60
  4. 85
  5. 65
  6. Obtuse
  7. 130
  8. 60
  9. 135
  10. Obtuse
  11. 160
  12. 130
  13. 40
  14. 15
  15. 35
  16. 95
  17. Acute
  18. Obtuse
  19. 30
  20. 140
  21. 80
  22. 125
  23. 95
  24. Acute
  25. Right
  26. 180
  27. 120
  28. 90
  29. 75
  30. 75
  31. 150
  32. 10
  33. 105
  34. 60
  35. Obtuse
  36. 120
  37. 80
  38. 20
  39. Acute
  40. 55

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