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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 752 · 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 90° and 50°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  8. 8.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  11. 11.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  13. 13.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  14. 14.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  21. 21.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  22. 22.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 35° and 100°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  28. 28.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  29. 29.An angle measures 80°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  30. 30.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  31. 31.An angle measures 85°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  34. 34.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  35. 35.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 140°. What is the other 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 of a triangle are 70° and 20°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. 95
  3. 60
  4. 15
  5. 180
  6. 60
  7. 70
  8. Acute
  9. 90
  10. Straight
  11. 65
  12. 85
  13. Acute
  14. 30
  15. 150
  16. 125
  17. 200
  18. 90
  19. 35
  20. 15
  21. Obtuse
  22. 50
  23. 45
  24. 75
  25. 150
  26. 160
  27. 25
  28. Right
  29. Acute
  30. Acute
  31. Acute
  32. 75
  33. Obtuse
  34. Obtuse
  35. 35
  36. 150
  37. 40
  38. 70
  39. 90
  40. 30

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