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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 291 · 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.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  4. 4.An angle measures 75°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  5. 5.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  10. 10.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  12. 12.An angle measures 15°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  13. 13.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  30. 30.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  31. 31.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  32. 32.An angle measures 20°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  33. 33.An angle measures 45°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  34. 34.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  35. 35.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  36. 36.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  38. 38.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  39. 39.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  40. 40.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Right

Answer key

  1. 135
  2. 75
  3. 190
  4. Acute
  5. 240
  6. 60
  7. 165
  8. 125
  9. Straight
  10. 80
  11. 50
  12. Acute
  13. 50
  14. 170
  15. 95
  16. 70
  17. 20
  18. 50
  19. 10
  20. 35
  21. 130
  22. 150
  23. 160
  24. 60
  25. 70
  26. 95
  27. 60
  28. 150
  29. 5
  30. Acute
  31. 145
  32. Acute
  33. Acute
  34. 140
  35. Obtuse
  36. 5
  37. 115
  38. Obtuse
  39. 30
  40. Acute

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