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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 916 · 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 70° and 70°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  5. 5.Two angles of a triangle are 35° and 140°. What is the third angle (in degrees)?
  6. 6.An angle measures 150°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  7. 7.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?
  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 60°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 20°. What is the other 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 30° and 25°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  27. 27.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  28. 28.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  30. 30.An angle measures 100°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  31. 31.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 35° and 110°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 70° and 35°. 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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?

Answer key

  1. 40
  2. 30
  3. 220
  4. Straight
  5. 5
  6. Obtuse
  7. 85
  8. 45
  9. 15
  10. 30
  11. 40
  12. 135
  13. 20
  14. 120
  15. 70
  16. 70
  17. 140
  18. 45
  19. 125
  20. 120
  21. 150
  22. 150
  23. Right
  24. 120
  25. 95
  26. 80
  27. Acute
  28. 35
  29. 25
  30. Obtuse
  31. 15
  32. 180
  33. 50
  34. 35
  35. 75
  36. 60
  37. 90
  38. 140
  39. 190
  40. 60

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