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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 249 · 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 120°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  2. 2.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  4. 4.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  11. 11.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  12. 12.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  13. 13.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  22. 22.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  23. 23.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  31. 31.An angle measures 65°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  32. 32.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  36. 36.An angle measures 110°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  37. 37.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 50
  3. Right
  4. 240
  5. 90
  6. 135
  7. 25
  8. 75
  9. 70
  10. Straight
  11. 80
  12. Obtuse
  13. 50
  14. 35
  15. 100
  16. 140
  17. 170
  18. 20
  19. 180
  20. 30
  21. 120
  22. Acute
  23. 240
  24. 95
  25. 50
  26. 90
  27. 30
  28. 10
  29. 190
  30. 50
  31. Acute
  32. 15
  33. 60
  34. 150
  35. 95
  36. Obtuse
  37. 110
  38. 60
  39. 45
  40. 80

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