The dimensions of the triangle shown are 12 units, 13 units and 5 units.
\The perimeter of the triangle is the sum of three lengths of sides of the triangle.
\Therefore, the perimeter of the triangle shown is units.
The dimensions of the triangle are 7 units, 11 units and 12 units.
\The perimeter of the triangle is units.
The perimeter of the above two triangles is same, so these are similar triangles.
The option F is correct answer.