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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 144 · 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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  3. 3.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  8. 8.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  10. 10.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  11. 11.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  17. 17.An angle measures 120°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  18. 18.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  22. 22.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  27. 27.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  28. 28.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 60° and 35°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  36. 36.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?

Answer key

  1. 90
  2. Straight
  3. 60
  4. 75
  5. 190
  6. 135
  7. Right
  8. 60
  9. 55
  10. Obtuse
  11. 35
  12. 80
  13. 170
  14. 120
  15. 180
  16. 200
  17. Obtuse
  18. 170
  19. 75
  20. 30
  21. Acute
  22. Acute
  23. 35
  24. 170
  25. 85
  26. 160
  27. Acute
  28. 90
  29. 60
  30. 85
  31. 150
  32. 85
  33. 40
  34. 65
  35. Obtuse
  36. 15
  37. 120
  38. 70
  39. 170
  40. 80

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