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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 672 · 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 11 o'clock (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  3. 3.Two angles of a triangle are 25° and 140°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 75° and 100°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  8. 8.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  9. 9.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  10. 10.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 70° and 60°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 80° and 65°. What is the third angle (in degrees)?
  19. 19.An angle measures 55°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  20. 20.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  21. 21.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  22. 22.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  25. 25.An angle measures 135°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.A right angle is split into two angles. One of them is 50°. 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 40°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  31. 31.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  36. 36.An angle measures 20°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  37. 37.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?

Answer key

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

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