Răspuns :
A=25 cm^2
A=(lat1•h1)/2=(lat2•h2)/2=(lat3•h3)/2
25=(lat1•4,8)/2=>lat1=50/4,8=10,41 cm
25=(lat2•6)/2=>lat2=50/6=8,33 cm
25=(lat3•8)/2=>lat3=50/8=6,25 cm
P∆=lat1+lat2+lat3=10,41+8,33+6,25=24,99 cm
A=(lat1•h1)/2=(lat2•h2)/2=(lat3•h3)/2
25=(lat1•4,8)/2=>lat1=50/4,8=10,41 cm
25=(lat2•6)/2=>lat2=50/6=8,33 cm
25=(lat3•8)/2=>lat3=50/8=6,25 cm
P∆=lat1+lat2+lat3=10,41+8,33+6,25=24,99 cm