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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 176 · 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.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  3. 3.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  5. 5.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  22. 22.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  23. 23.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  31. 31.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  32. 32.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  36. 36.Two angles of a triangle are 45° and 95°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  38. 38.An angle measures 135°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  39. 39.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. 20
  2. Right
  3. 60
  4. Straight
  5. 220
  6. 25
  7. 55
  8. 100
  9. 85
  10. 10
  11. 260
  12. 20
  13. 90
  14. 60
  15. 220
  16. 90
  17. 140
  18. 45
  19. 60
  20. 50
  21. 60
  22. Obtuse
  23. 40
  24. 55
  25. 120
  26. 20
  27. 35
  28. 110
  29. 120
  30. 110
  31. Acute
  32. 40
  33. 30
  34. 150
  35. 180
  36. 40
  37. 10
  38. Obtuse
  39. 90
  40. 75

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