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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 837 · 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 65° and 85°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 11 o'clock (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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  9. 9.An angle measures 100°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  10. 10.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 60° and 65°. What is the third 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 75°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  14. 14.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  19. 19.An angle measures 170°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  20. 20.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 45°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  29. 29.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  30. 30.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  33. 33.An angle measures 145°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  34. 34.An angle measures 65°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  35. 35.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  36. 36.An angle measures 60°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  37. 37.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 5 o'clock (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.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse

Answer key

  1. 30
  2. 150
  3. 30
  4. 75
  5. 90
  6. 15
  7. 110
  8. 90
  9. Obtuse
  10. 20
  11. 55
  12. 60
  13. Acute
  14. 15
  15. 60
  16. 85
  17. 120
  18. 70
  19. Obtuse
  20. 70
  21. 50
  22. 90
  23. 120
  24. 210
  25. 25
  26. 110
  27. 30
  28. 100
  29. Straight
  30. 65
  31. 30
  32. 60
  33. Obtuse
  34. Acute
  35. 170
  36. Acute
  37. 190
  38. 150
  39. 45
  40. Right

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