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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 491 · 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 60° and 20°. 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 85° and 65°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 35° and 130°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  16. 16.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  20. 20.An angle measures 95°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  21. 21.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  22. 22.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  23. 23.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  24. 24.An angle measures 40°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  25. 25.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  31. 31.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  32. 32.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  38. 38.An angle measures 110°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  39. 39.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?

Answer key

  1. 100
  2. Straight
  3. 30
  4. 35
  5. 150
  6. 170
  7. 180
  8. 55
  9. 190
  10. 30
  11. 140
  12. 35
  13. 15
  14. 155
  15. Obtuse
  16. 45
  17. 90
  18. 70
  19. 140
  20. Obtuse
  21. 110
  22. Acute
  23. 20
  24. Acute
  25. 100
  26. 20
  27. 90
  28. 60
  29. 170
  30. 5
  31. Right
  32. 135
  33. 30
  34. 60
  35. 40
  36. 230
  37. 45
  38. Obtuse
  39. 130
  40. 80

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