sobre una recta se ubican los puntos consecutivos A;b;c y d tales que B es punto medio de A C calcular B D sabiendo que A D + C D =18​

a. by accepting the election of president abraham lincoln in 1860 and convincing other southern states to do the same

what is the question?

mapmaking. cartography had been an art form for many years, but it wasn’t until the renaissance when ptolemy’s ancient system of latitude and longitude was rediscovered that mapmakers were able to make surprisingly accurate and useful maps.