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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 257 · 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.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  3. 3.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  10. 10.An angle measures 140°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  11. 11.An angle measures 60°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  12. 12.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  20. 20.An angle measures 125°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  21. 21.Two angles of a triangle are 25° and 80°. What is the third angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  27. 27.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  28. 28.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  40. 40.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right

Answer key

  1. 160
  2. Straight
  3. 10
  4. 60
  5. 80
  6. 80
  7. 220
  8. 105
  9. 60
  10. Obtuse
  11. Acute
  12. 60
  13. 30
  14. 60
  15. 135
  16. 15
  17. 70
  18. 30
  19. 90
  20. Obtuse
  21. 75
  22. Right
  23. 35
  24. 65
  25. 10
  26. 20
  27. Obtuse
  28. 40
  29. 125
  30. 95
  31. 120
  32. 125
  33. 10
  34. 165
  35. 210
  36. 170
  37. 35
  38. 65
  39. 80
  40. Acute

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