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This diagram shows a pre-image △ABC , and its image, △A′′B′′C′′ , after a series of transformations.
Select from the drop-down menus to correctly complete the statements.
△ABC is___ ( reflected across the y axis , reflected across the line y=x ,or rotated 90 degrees counterclockwise about the origin )
to become △A′B′C′ . Then △A′B′C′ is ___(reflected across the x axix, translated 4 units down , or rotated 180 degrees about the origin )to become △A′′B′′C′′ . Because the transformations are_____ (both rigid or not both rigid) , the pre-image and image are _______(congruent or not congruent ) .