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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 953 · 40 sums
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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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  3. 3.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  4. 4.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 110°. 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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  10. 10.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  11. 11.An angle measures 30°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  12. 12.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  14. 14.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  15. 15.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 30° and 140°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  26. 26.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  27. 27.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  33. 33.An angle measures 75°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  34. 34.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  35. 35.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  36. 36.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?
  38. 38.An angle measures 170°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  39. 39.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  40. 40.An angle measures 55°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute

Answer key

  1. 90
  2. 110
  3. Acute
  4. 75
  5. 160
  6. 80
  7. 90
  8. 150
  9. Right
  10. 120
  11. Acute
  12. 30
  13. 85
  14. Obtuse
  15. 220
  16. 80
  17. 85
  18. 80
  19. 10
  20. 10
  21. 20
  22. 160
  23. 30
  24. 85
  25. 90
  26. Obtuse
  27. 15
  28. 180
  29. 15
  30. 30
  31. 140
  32. 25
  33. Acute
  34. 80
  35. Obtuse
  36. 30
  37. 20
  38. Obtuse
  39. 5
  40. Acute

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