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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 828 · 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.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  3. 3.An angle measures 65°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  4. 4.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 80° and 55°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  9. 9.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.An angle measures 60°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  11. 11.Two angles of a triangle are 45° and 100°. What is the third angle (in degrees)?
  12. 12.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  13. 13.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  21. 21.An angle measures 150°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  22. 22.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  28. 28.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  29. 29.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  30. 30.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 2 o'clock (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.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 50° and 95°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?

Answer key

  1. Obtuse
  2. 150
  3. Acute
  4. 5
  5. 45
  6. 90
  7. 25
  8. 85
  9. Acute
  10. Acute
  11. 35
  12. Acute
  13. 40
  14. 170
  15. 125
  16. 60
  17. 150
  18. 190
  19. 55
  20. 120
  21. Obtuse
  22. 80
  23. 50
  24. 50
  25. 110
  26. 85
  27. 90
  28. Right
  29. Straight
  30. 160
  31. 150
  32. 25
  33. 15
  34. 35
  35. 70
  36. 60
  37. 10
  38. 30
  39. 35
  40. 60

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