Sabc=√p(p-26)(p-28)(p-30)
p= (26+28+30)/2=42
Sabc=√42(42-26)(42-28)(42-30)=√42*16*14*12=√112896=336 cм2
Sabc=√p(p-26)(p-28)(p-30)
p= (26+28+30)/2=42
Sabc=√42(42-26)(42-28)(42-30)=√42*16*14*12=√112896=336 cм2