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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 533 · 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 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  2. 2.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  11. 11.An angle measures 65°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  12. 12.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  17. 17.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  18. 18.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  20. 20.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  22. 22.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  23. 23.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 35° and 110°. What is the third angle (in degrees)?
  30. 30.An angle measures 145°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  31. 31.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 20° and 105°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 35° and 140°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 35
  3. Straight
  4. Obtuse
  5. 40
  6. 10
  7. 25
  8. 45
  9. 110
  10. 140
  11. Acute
  12. 150
  13. 100
  14. 85
  15. 20
  16. 120
  17. Obtuse
  18. 50
  19. Right
  20. 165
  21. 240
  22. Acute
  23. 70
  24. 60
  25. 10
  26. 140
  27. 45
  28. 60
  29. 35
  30. Obtuse
  31. 30
  32. 90
  33. 110
  34. 60
  35. 50
  36. 55
  37. 60
  38. 5
  39. 15
  40. 55

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