This problem can be solved by Menelaus theorem. Menelaus theorem: the product of the ratio of three sides (extension lines) of a straight line intersecting a triangle is equal to 1. Take △ABD in the figure as an example. If three sides of the straight line FC (AD side is on the extension line) intersect △ABD in F, I and C, then (FA/FB) (IB/ID) (CD/CA) = 60. If you substitute the above formula, you can get IB/ID= -6, and the three sides of the straight line AE △BCD (CD side is on the extension line) are in E, A and H, then (EB/EC) (AC/AD) (HD/HB) = 1, EB/EC =-1. Similarly, g is the midpoint of AH and I is the midpoint of CG. Triangle ABC is divided into seven equal small triangles by the property that the area of the triangle is equally divided by the midline, so.

t = 13 10665549698 & amp； t = 13 10666478 122