Help me pls im trying so fhafx not to fosl

How are sas and sss used to show that two triangles are congruent?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Free points also plz look my profile and answer really stuff