What additional information do you need to prove that ∆amd ≅ ∆cnb by the hl theorem? a) (lines) an = cm b) ∠d ≅ ∠b c) ∠amc ≅ ∠cna d) (lines am = cn

(H)ypotenuse (L)eg, right-triangle theorem.

based on the provided graph, we know the hypotenuses are equal, thus the tickmarks, so H is true, now the L part, we only need either of the pair of legs to be equal DM = NB or AM = CN, if either one is true, we're golden.