Question

ajut rapid!!!!!!!!!!!!

Answer 1

$P_{ABC}=2AB+AC \\ 2AB+AC=100 \\ P_{ABM}=AB+ \frac{AC}{2}+BM \\ P_{ABM}=AB+ \frac{AC}{2}+30/*2 \\ 2 P_{ABM}=2AB+AC+60 \\ 2 P_{ABM}=100+60 \\ 2 P_{ABM}=160 \\ P_{ABM}=80 cm$