Answer:
The type of ∠9 and ∠11 are corresponding angles
The transversal is line D
lines A and B are parallel
Explanation:
From the given figure
∵ Lines A and B are intersected by line D
∴ Line D is the transversal of lines A and B
∵ ∠9 and ∠11 In the same side of line D
∵ ∠9 is above line A and ∠11 is above line B
∴ ∠9 and ∠11 are in the corresponding position
∴ ∠9 and ∠11 are corresponding angles
∴ The type of ∠9 and ∠11 are corresponding angles
∴ The transversal is line D
∵ ∠9 ≅ ∠11
∵ ∠9 and ∠11 in the corresponding position
∵ ∠9 and ∠11 between lines A and B
∴ lines A and B are parallel.