Question

proof of AAA similarity

Answer 1

If in two triangles, corresponding angles are equal, then their corresponding sides are in the same ratio(or propotion) and hence the two triangles are similar.

In triangle ABC and DEF
A=D, B=E, C=F
Cut DP=AB and DQ =AC and join PQ
triangle ABC is correspondent to tri DPQ
B=P=E and PQ// EF
DP/PE=DQ/QF
AB/DE=AC/DF

 Similarly, AB/= BC/EF  and AB/DE=BC/EF=AC/DF.
Hece proofed

Answer 2

$\textbf{Answer is in Attachment !}$