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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 894 · 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 95° and 60°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  4. 4.An angle measures 140°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  5. 5.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 45° and 70°. What is the third angle (in degrees)?
  7. 7.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  8. 8.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  12. 12.An angle measures 15°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  13. 13.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  17. 17.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  21. 21.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  22. 22.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  24. 24.An angle measures 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  32. 32.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  33. 33.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  35. 35.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  36. 36.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?

Answer key

  1. 25
  2. 35
  3. 160
  4. Obtuse
  5. 65
  6. 65
  7. Acute
  8. 20
  9. 135
  10. 25
  11. 10
  12. Acute
  13. 85
  14. 120
  15. 70
  16. Right
  17. 30
  18. 90
  19. 105
  20. Straight
  21. Acute
  22. 165
  23. 160
  24. Acute
  25. 55
  26. 35
  27. 150
  28. 70
  29. 110
  30. 160
  31. 60
  32. Obtuse
  33. 50
  34. 40
  35. Acute
  36. 60
  37. 80
  38. 120
  39. 30
  40. 150

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