Answer-
The value of y is 6 units.
Solution-
Given ∆ABC ≅ ∆GEF
If two triangles are congruent, then the corresponding sides are also congruent.
So,
EF = BC, GF = AC
Putting the values,
\(\Rightarrow x-y=4\) --------------1
\(\Rightarrow x-8=2\)
\(\Rightarrow x=10\) --------------------2
Putting the values of x in equation 1,
\(\Rightarrow 10-y=4\)
\(\Rightarrow y=10-4=6\)
Therefore, the value of y is 6 units.
