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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 292 · 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.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  4. 4.An angle measures 100°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  5. 5.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  12. 12.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 60° and 85°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  18. 18.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  19. 19.An angle measures 155°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  20. 20.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  22. 22.An angle measures 75°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  23. 23.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  24. 24.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  25. 25.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  30. 30.An angle measures 45°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  31. 31.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  36. 36.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  37. 37.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 50° and 90°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?

Answer key

  1. 65
  2. 110
  3. 115
  4. Obtuse
  5. 75
  6. 85
  7. 15
  8. 70
  9. 40
  10. 60
  11. Right
  12. 70
  13. 35
  14. 65
  15. 120
  16. 85
  17. 95
  18. Acute
  19. Obtuse
  20. 100
  21. 15
  22. Acute
  23. Straight
  24. Obtuse
  25. 35
  26. 80
  27. 100
  28. 15
  29. 80
  30. Acute
  31. 170
  32. 35
  33. 90
  34. 125
  35. 80
  36. Acute
  37. 50
  38. 55
  39. 40
  40. 140

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