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Celeste International School

Grade 6 · Worksheet

Angles and constructions

Intersecting lines

Name: ______________________________Date: ______________Score: ______ / 20
  1. 1.

    Two lines cross. One angle is 68°. What is the angle opposite it?

    °
  2. 2.

    What is true about opposite angles where two lines cross?

    1. Athey are equal
    2. Bthey add up to 180°
    3. Cthey add up to 90°
  3. 3.

    What does 'parallel' mean?

    1. Aalways the same distance apart and never meeting
    2. Bcrossing at 90°
    3. Cof equal length
  4. 4.

    Two perpendicular lines cross. What is the size of each of the four angles?

    °
  5. 5.

    Two lines cross. One angle is 48°. What is the SUM of that angle and the one next to it?

    °
  6. 6.

    Two lines cross. One angle is 131°. What is the angle opposite it?

    °
  7. 7.

    Two lines cross making an angle of 113°. What are the four angles?

    1. A113°, 113°, 113°, 113°
    2. B113°, 67°, 113°, 67°
    3. C113°, 247°, 113°, 247°
  8. 8.

    Two lines cross. One angle is 42°. What is the SUM of that angle and the one next to it?

    °
  9. 9.

    Two lines cross. One angle is 54°. What is the angle next to it on the straight line?

    °
  10. 10.

    If one angle where two lines cross is 36°, the opposite angle is 144°.

    True False
  11. 11.

    Two lines cross at 63°. Are they perpendicular?

    1. Ano
    2. Byes
  12. 12.

    Two lines cross. One angle is 31°. What is the angle next to it on the straight line?

    °
  13. 13.

    Angles of 36° and x° sit next to each other on a straight line. What is x?

    °
  14. 14.

    Two lines cross. One angle is 103°. What is the angle opposite it?

    °
  15. 15.

    Two lines cross making an angle of 85°. What are the four angles?

    1. A85°, 85°, 85°, 85°
    2. B85°, 95°, 85°, 95°
    3. C85°, 275°, 85°, 275°
  16. 16.

    Two lines cross. One angle is 39°. What is the SUM of that angle and the one next to it?

    °
  17. 17.

    Two lines cross. One angle is 80°. What is the angle opposite it?

    °
  18. 18.

    If one angle where two lines cross is 139°, the opposite angle is 41°.

    True False
  19. 19.

    Two lines cross. One angle is 49°. What is the SUM of that angle and the one next to it?

    °
  20. 20.

    Two lines cross. One angle is 134°. What is the angle next to it on the straight line?

    °
Celeste International School

Answer key

Angles and constructions — Intersecting lines

  1. 1.68 °
  2. 2.A. they are equal
  3. 3.A. always the same distance apart and never meeting
  4. 4.90 °
  5. 5.180 °
  6. 6.131 °
  7. 7.B. 113°, 67°, 113°, 67°
  8. 8.180 °
  9. 9.126 °
  10. 10.False
  11. 11.A. no
  12. 12.149 °
  13. 13.144 °
  14. 14.103 °
  15. 15.B. 85°, 95°, 85°, 95°
  16. 16.180 °
  17. 17.80 °
  18. 18.False
  19. 19.180 °
  20. 20.46 °