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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 230 · 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 150° and 80°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  8. 8.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  10. 10.An angle measures 170°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  11. 11.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 40° and 30°. What is the third angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  16. 16.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.An angle measures 45°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  30. 30.An angle measures 160°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  31. 31.An angle measures 40°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  32. 32.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  33. 33.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  34. 34.An angle measures 60°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  35. 35.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?

Answer key

  1. 130
  2. 120
  3. 130
  4. 30
  5. 45
  6. 30
  7. Right
  8. 35
  9. 20
  10. Obtuse
  11. 90
  12. 125
  13. 250
  14. 110
  15. Straight
  16. 25
  17. 90
  18. 150
  19. 60
  20. 160
  21. 140
  22. 30
  23. Acute
  24. 120
  25. 100
  26. 180
  27. 85
  28. 115
  29. 35
  30. Obtuse
  31. Acute
  32. 40
  33. Acute
  34. Acute
  35. 230
  36. 80
  37. 120
  38. 105
  39. 65
  40. 190

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