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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 875 · 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.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  2. 2.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  11. 11.An angle measures 155°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  12. 12.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  19. 19.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  20. 20.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  21. 21.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  28. 28.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  29. 29.An angle measures 40°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  30. 30.An angle measures 30°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  31. 31.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  34. 34.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  35. 35.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. 50
  3. 60
  4. 180
  5. 55
  6. 60
  7. 145
  8. 35
  9. 80
  10. 105
  11. Obtuse
  12. 90
  13. 35
  14. 100
  15. 140
  16. 170
  17. 50
  18. Straight
  19. 35
  20. Obtuse
  21. 150
  22. 160
  23. 45
  24. 120
  25. 85
  26. 130
  27. 60
  28. Acute
  29. Acute
  30. Acute
  31. 45
  32. 70
  33. 5
  34. Obtuse
  35. 10
  36. 200
  37. 5
  38. 60
  39. 75
  40. 55

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