Observe the figures,

In $\"\"$ , $\"\"$ .

$\"\"$

In $\"\"$ , $\"\"$ .

$\"\"$

Find whether the triangles are similar or not.

If two pairs of corresponding angles in a pair of triangles are congruent, then the two triangles are similar.

Here two pairs of angles in both triangles are same.

Observe the figure:

By the tranverse property of parallel lines.

$\"\"$ are same.

If two pairs of corresponding angles in a pair of triangles are congruent, then the two triangles are similar.

Thus in $\"\"$ and $\"\"$ , two pairs of angles are same.

Therefore, $\"\"$ and $\"\"$ are similar.

Observe the figure:

$\"\"$ are same.

$\"\"$ is same in both $\"\"$ and $\"\"$ .

If two pairs of corresponding angles in a pair of triangles are congruent, then the two triangles are similar.

Thus in $\"\"$ and $\"\"$ , two pairs of angles are same.

Therefore, $\"\"$ and $\"\"$ are similar.

Thus, the pair of triangles are similar.

$\"\"$