Math Trivia : △ ABC is divided into five triangles of equal area.






△ ABC is divided into five triangles of equal area. 
Find AD:DE:EC. 

3:4:8
As △ABD : △DBC = 1 : 4, AD : DE = 1 : 4. 
As △DFE : △EFC = 1 : 2, DE : EC = 1 : 2. 
DE = 4 × 1/(1+2) = 4/3 
EC = 4/3 × 2 = 8/3 
Therefore, AD : DE : EC = 1 : 4/3 : 8/3 = 3 : 4 : 8.

Mt.Fuji & Sakura