Answer:
The bottom two figures
Explanation:
Two figures are similar if their angle measures are the same and corresponding sides are proportional.
The bottom left figure has angle measures of 37°, 53° and 90°. The bottom right figure has the same angle measures.
The sides of the bottom left figure have lengths of 3, 4 and 5. The corresponding sides of the bottom right figure have lengths of 6, 8 and 10. This means they are proportional.
The figures are similar.