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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 162 · 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 of a triangle are 45° and 75°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?
  4. 4.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  5. 5.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  11. 11.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  16. 16.An angle measures 115°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  17. 17.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. 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 1 o'clock (in degrees)?
  22. 22.An angle measures 145°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  23. 23.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  31. 31.An angle measures 20°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  32. 32.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  34. 34.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  35. 35.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 40°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?

Answer key

  1. 60
  2. 15
  3. 45
  4. Acute
  5. 90
  6. 165
  7. 100
  8. 15
  9. 50
  10. Right
  11. 150
  12. 60
  13. 155
  14. 240
  15. 5
  16. Obtuse
  17. 70
  18. 120
  19. 55
  20. 120
  21. 30
  22. Obtuse
  23. 40
  24. 60
  25. 110
  26. 60
  27. 140
  28. 210
  29. 80
  30. Straight
  31. Acute
  32. 110
  33. 130
  34. Obtuse
  35. 145
  36. 20
  37. 100
  38. 100
  39. 45
  40. 120

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