Ineed solving this geometry problem.

Don't know how to find x given these segment lengths

Find the measurement of angle b in the following triangle

Given: lkm jkm, clmk prove: alkmajkm jmk. choose the word that completes the sentence correctly. proof: lkm jkm and lmk * umk are given. km km by the property of congruence. equivalence symmetric reflexive transitive