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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 878 · 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 30° and 50°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  3. 3.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  4. 4.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  6. 6.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  9. 9.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  15. 15.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  16. 16.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  17. 17.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  18. 18.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  19. 19.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  25. 25.An angle measures 10°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  26. 26.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  27. 27.Two angles of a triangle are 70° and 85°. What is the third 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 together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  35. 35.An angle measures 35°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  36. 36.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  37. 37.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. 100
  2. 60
  3. Obtuse
  4. 20
  5. Right
  6. 70
  7. 30
  8. Straight
  9. 15
  10. 20
  11. 30
  12. 55
  13. 50
  14. 10
  15. Acute
  16. Obtuse
  17. 50
  18. Obtuse
  19. 75
  20. 110
  21. 180
  22. 150
  23. 80
  24. 60
  25. Acute
  26. Acute
  27. 25
  28. 140
  29. 60
  30. 85
  31. 80
  32. 40
  33. 40
  34. 160
  35. Acute
  36. Acute
  37. 65
  38. 55
  39. 80
  40. 120

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