a complex answer

来源: 于 2026-05-01 05:47:40 [旧帖] [给我悄悄话] 本文已被阅读：次

h1 and h2 are height for both ABF and OEF

SABF=6/7x(1/2)x84x(1/2)=18, the first ½ is for the (h1+h2)=1/2 of BC, the second one is for the half area of the ABCD, quite complex, other solutions are much better.