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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 255 · 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 100° and 100°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  5. 5.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  6. 6.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  12. 12.An angle measures 60°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  13. 13.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  16. 16.An angle measures 30°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  17. 17.An angle measures 130°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  18. 18.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.An angle measures 170°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  21. 21.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 35° and 20°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  31. 31.An angle measures 110°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  32. 32.Two angles of a triangle are 45° and 125°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?

Answer key

  1. 160
  2. 45
  3. 120
  4. 80
  5. Acute
  6. 150
  7. 60
  8. 60
  9. 120
  10. 170
  11. Right
  12. Acute
  13. 120
  14. 120
  15. 65
  16. Acute
  17. Obtuse
  18. 100
  19. Straight
  20. Obtuse
  21. 70
  22. 15
  23. 125
  24. 30
  25. 10
  26. 15
  27. 15
  28. 150
  29. 25
  30. 230
  31. Obtuse
  32. 10
  33. 45
  34. 10
  35. 90
  36. 70
  37. 40
  38. 160
  39. 80
  40. 95

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