Answer:

5.line DG and line EF are collinear lines.

6.line BH is perpendicular to line GD and line AE

7.lines AE and GD intersects at point O

Step-by-step explanation:

5.COLLINEAR-Points that lie on the same line

6.PERPENDICULAR-when two lines are crossed together

7.O is the in the middle point of line AE and GD