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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 741 · 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.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  6. 6.An angle measures 115°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  9. 9.An angle measures 100°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  10. 10.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  15. 15.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  16. 16.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 45° and 70°. What is the third angle (in degrees)?
  24. 24.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  25. 25.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  29. 29.An angle measures 55°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  30. 30.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  32. 32.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  33. 33.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. 85
  2. 90
  3. 150
  4. 125
  5. 65
  6. Obtuse
  7. 90
  8. 155
  9. Obtuse
  10. 25
  11. 30
  12. 100
  13. 90
  14. 45
  15. Right
  16. 40
  17. 45
  18. 80
  19. 140
  20. 180
  21. 110
  22. 70
  23. 65
  24. Obtuse
  25. 115
  26. 30
  27. 145
  28. 65
  29. Acute
  30. 20
  31. 210
  32. Straight
  33. 80
  34. 65
  35. 160
  36. 10
  37. 15
  38. 50
  39. 10
  40. 165

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