Given: js ≅ ks; ∠1 ≅ ∠8; ∠2 ≅ ∠7

which postulate justifies that δjas ≅ δ kcs?
a) aas correct answer
b) asa
c) sas
d) sss

Triangle ΔJAS:
we know side JS, angle 1 and angle 2 

Triangle ΔKCS:
we know side KS, angle 7 and angle 8

For each of these triangles we know one side and two angles.

In the possible answers A stands for angle and S stands for side.
So the correct answer would be something that involves one S and two As. That could be either a) or b). We choose a) because we have two angles and a side opposite to one of them. We would choose b) if the side was between these two angles.

What are the following algebraic equations. you need to post those if you want the answer