How to find the length of line BD
first find AC(AC)^2=(AD)^2+(DC)^2(AC)^2=2.5^2+25AC=5.6now lets find BCBC^2=CD^2+DB^2BC=25+4x^2+16+16xBC=4x^2+16x+41i couldnot find BD..i guess there is not enough information for BD