I I have steps 1 through 3 but I couldn't figure out the rest, i could use a little help please if you know

Answer:
Step-by-step explanation:
AD║ BC & AC is transversal,
∠DAC =∠ ACB { ALTERNATE OPPOSITE ANGLES }
ΔDAC ≅ ΔACB { SAS CONGRUENT}
Hence, AB = DC {CPCT}