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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 817 · 40 sums
TalentJR

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 135°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  7. 7.An angle measures 15°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  8. 8.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  19. 19.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  20. 20.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  22. 22.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  28. 28.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  29. 29.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  33. 33.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  34. 34.An angle measures 45°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  35. 35.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?

Answer key

  1. 45
  2. 50
  3. 120
  4. 85
  5. 100
  6. 35
  7. Acute
  8. 140
  9. 150
  10. 135
  11. 130
  12. 30
  13. 60
  14. 125
  15. 230
  16. 220
  17. 50
  18. 105
  19. Acute
  20. 30
  21. 180
  22. Obtuse
  23. 35
  24. 125
  25. 170
  26. 110
  27. 70
  28. Acute
  29. 150
  30. 90
  31. 160
  32. 60
  33. Right
  34. Acute
  35. 100
  36. 110
  37. 155
  38. 45
  39. 145
  40. 120

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