The crossing point a is the height h 1 on the side of BC, △ABC=0.5*BC*h 1, △ABD=0.5*BD*h 1,

△ABC:△Abd =(0.5 * BC * h 1):△Abd = 16，△ADC=48。

The intersection point c is taken as the height h2 of the AD side, △ADC=0.5*AD*h2, △AFC=0.5*AF*h2,

△AFC= 12，△FDC = 36 from△ADC:△AFC =(0.5 * AD * H2):(0.5 * AF * H2)。

The intersection d is the height h3 of FC side, △DFC=0.5*FC*h3, △DEC=0.5*EC*h3,

△DEC=9 and △DEF=27 are composed of △ DFC: △ DEC = (0.5 * FC * H3): (0.5 * EC * H3).

Satisfied, please adopt! ! !