Someone help me with this .. I already have first part I just need the last part.

Plz help plz give me the answer

What other information do you need to prove triangle dac=bca by asa

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.