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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 413 · 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 45° and 100°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  5. 5.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  6. 6.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  10. 10.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  12. 12.An angle measures 110°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  13. 13.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other 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.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  20. 20.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  21. 21.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  22. 22.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  23. 23.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  24. 24.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  25. 25.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  26. 26.An angle measures 35°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  27. 27.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?

Answer key

  1. 35
  2. 70
  3. 65
  4. 80
  5. Acute
  6. 180
  7. 180
  8. 150
  9. Right
  10. 130
  11. 55
  12. Obtuse
  13. 70
  14. 120
  15. 70
  16. 160
  17. 170
  18. 190
  19. 65
  20. Acute
  21. Acute
  22. 25
  23. Acute
  24. Acute
  25. 180
  26. Acute
  27. 60
  28. 220
  29. 40
  30. 90
  31. 70
  32. 45
  33. 210
  34. 5
  35. 160
  36. 160
  37. 30
  38. 80
  39. 125
  40. 30

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