One swish on an angle is one triangle is congruent to the angle in the other triangle that has one swish. Just like the angle in one triangle with 2 swishes is congruent to the angle in the other triangle with 2 swishes. That means, in our triangles, ∠A is congruent to ∠F. ∠C is congruent to ∠G. ∠B is congruent to ∠D
