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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 848 · 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 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  2. 2.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  10. 10.An angle measures 135°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  11. 11.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  13. 13.An angle measures 140°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  14. 14.Two angles of a triangle are 80° and 35°. What is the third angle (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 35°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  17. 17.An angle measures 70°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  18. 18.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  21. 21.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  22. 22.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  25. 25.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 60° and 65°. What is the third angle (in degrees)?
  30. 30.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  31. 31.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  32. 32.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 65
  3. 125
  4. 240
  5. 80
  6. 85
  7. 5
  8. 50
  9. 120
  10. Obtuse
  11. 55
  12. 60
  13. Obtuse
  14. 65
  15. 65
  16. Acute
  17. Acute
  18. 40
  19. 30
  20. 95
  21. Acute
  22. 130
  23. 90
  24. 60
  25. Acute
  26. 35
  27. 130
  28. 145
  29. 55
  30. Right
  31. Acute
  32. 60
  33. 160
  34. 140
  35. 45
  36. 90
  37. 70
  38. 150
  39. 100
  40. 75

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